Good vs. Evil: How do we tell?

I started a study about a year ago. I was thinking of how we're told in these last days good will be called evil and evil called good. I was also thinking of how those who stand for good things are often portrayed as anything but, and those who secretly (or not so secretly) stand for bad/immoral, etc. things are either lifted up or they have such a way with words that they are able to trick even the best of us. History is replete with examples of both. So while history can often be skewed based on who wrote the history books, so to speak, I turned the ultimate authority of the scriptures for my study. My study was conducted in the Book of Mormon (although such a study could be conducted in any book of scripture with similar results) and over the past year while reading it, I pulled out and documented every instance of the following that I could find. Because I am not perfect, there may be more that I missed.

Instances of evil doers being popular/tricky
-King Noah and his priests use flattery and lead people to much wickedness: Mosiah 11:7
-Samuel the Lamanite points out contrasting examples (see other side below in next section); "flattery," no consequences for actions: Helaman 13:27-28
-inspired men testify boldly, and lawyers and chief judges, high priests are very angry because of; prophets are put to death secretly: 3 Nephi 6:20-23
-Secret combinations tribe leader Jacob flatters to gain dissenters: 3 Nephi 7:12
-Rebellious Alma the younger a "man of many words" and does "speak much flattery" causing people to commit iniquity: Mosiah 27:8, 26:6
-Sherem is "learned," has a "perfect knowledge of the language," uses "flattery and much power of speech" to "overthrow the doctrine of Christ": Jacob 7:4
-Zeezrom, the "most expert" of lawyers tries to catch Alma and Amulek with tricky words for money: Alma 10:31-32; all ch. 11
-Korihor leads away the hearts of many by teaching Anti-Christ doctrine: Alma 30:12-18
-Amalikiah leads away by flattering words and promises for power; seeks to be king and destroy foundations of liberty: Alma 46:1-10

Instances of prophets/good people being accused of bad things
-Abinadi called contentious/wanting to stir up anger: Mosiah 11:28
-Nephi, son of Helaman, called a liar and said to "condemn" and "revile" against the law: Helaman 8:1-6
-Samuel the Lamanite points out contrasting examples (see other side in above section); testifies of iniquity, is called "sinner," "devil," "false prophet": Helaman 13:26
-Samuel the Lamanite is said to have a devil: Helaman 16:6
-Lachoneus is called wicked by Giddianhi, leader of Gadianton robbers: 3 Nephi 3:10
-inspired men testify boldly, and lawyers and chief judges, high priests are very angry because of; prophets are put to death secretly: 3 Nephi 6:20-23
-Prophet Ether "esteemed as naught" and cast out: Ether 13:13
-Lehi is mocked and the wicked are angry with him because of his prophecies; other prophets treated similarly: 1 Nephi 1:19-20
-Lehi and Nephi are said by Laman and Lemuel and co. to be foolish, trying to gain power over and rule over others:
-Alma and Amulek thrown into prisons and have their lives threatened because of their preaching: Alma 8:31
-Korihor claims church leaders/priests seek to usurp power over the people: Alma 30:23-31

I wanted to share this with everyone because I want to stress that sometimes people are not what they seem and that we need to be careful to support and follow the right people, politically and otherwise. We as good people cannot afford to be tricked. This is especially important with elections coming up in November. Since we can obviously not always rely on someone's words, either their own representation or someone else's opinion of them, or popular culture/media's representation of a person, how do we decide who is "the real deal?" Who is really good? How can we avoid being tricked? I came up with a couple of good answers.

First, we can know someone's true character by their "fruits."
3 Nephi 14:17-18 "Even so every good tree bringeth forth good fruit; but a corrupt tree bringeth forth evil fruit. A good tree cannot bring forth evil fruit, neither a corrupt tree bring forth good fruit."
So in terms of at least politicians, what are their voting records? What do they support with their actions, not words? Do they live an honest personal/family life? (Yes, I absolutely believe integrity in one's personal life has everything to do with public life as it is pure evidence of their true character.) Don't look at how one talks the talk, look at how they walk the walk.

Second, we've been given the power to judge for ourselves and with the Lord's help we can come to correct conclusions.
D&C 9:8 "But, behold, I say unto you, that you must study it out in your mind; then you must ask me if it be right, and if it is right I will cause that your bosom shall burn within you; therefore, you shall feel that it is right.
This translates to me as "do your homework." I promise that "evil doers" have hidden their real intent and messages very well. You actually have to put in the work, study and research. Do more than passively hear one newscaster's assessment. Get the whole story. Spend the time. Then ask the Lord. It's a promise.