I don't recall ever encountering anyone who actually believed that Green Lanterns are real; I wouldn't hesitate to mock them if they had such a silly belief. I would point out that there are some on this forum who regularly tout their belief in UFOs and aliens...
When you see anyone who chooses the name of a comic book superhero alien, who comes onto a bulletin board that promotes social, fiscal, political, and religiously conservative opinions - who professes their belief in atheism and "capital L" Libertarianism, who denies social conservatism, and who posts opinions ridiculing others for having social, fiscal, political, and religiously conservative beliefs - the same beliefs that said bulletin board agrees with and promotes, mind you - ping me.
Why? Because as you said in post #12 above:
"...as for being snarky and cynical...why not? Some beliefs deserve to be mocked".
Along with 80% + of the general population—particularly the BETTER EDUCATED amongst them.