Most recently, he authored a proposed law in Louisiana banning the sale of mature games to kids. It passed, but a federal judge struck it down on First Amendment grounds.
Thompson still has no shortage of critics.
"The fact is that a lot of people are discomforted by what I do and how I do it, because I'm an 'in your face' kinda person," he said.
"I am a flawed, [a] fallen creature, but I think I'm involved in something that's righteous. Because I got a son. And there are people who don't even know him, and don't know all the other sons that are out there. And they don't care about those kids. They wanna make money off of them."
Thompson also blames his failure in some of his missions on the odds stacked against him. He says it's simply "not a fair fight."
"I'm up against a lot of powerful people, and a lot of money," he said.
But Thompson takes heart from another ancient hero with the odds stacked against him.
"[My] most favorite story in the Bible is David and Goliath," Thompson said. "There's something in everybody's heart that responds to the underdog."
That story, like so many in the Bible, is a very violent one.
It ends with David knocking Goliath down with a slingshot and beheading him. How would Thompson feel about a David and Goliath video game?
"I wouldn't want my son, hour after hour, practicing the violence," Thompson said. "I feel like an underdog. These guys are big dogs, but I happen to be right. And they happen to be wrong. … I'm a big fan, as many people are, of Winston Churchill, who told his audience, 'Never, never, never, never, never give in.'"