Perhaps not jail, yet. People have had their careers and reputations attacked.
...for abusing their careers and doing things which justifiably damage their reputations...
Certain radicals have proposed jail for other activities generally considered to be non-liberal.
The same goes for "certain radicals" on the conservative side, for activities "generally considered to be non-conservative". Do you have a point to make, or do you wnat to speak in broad, vague generalities?
And in some cases they have been successful.
Until you say something specific for a change, it's really hard to tell if these alleged "some cases" a) actually exist, and b) are actually relevant to your following bit of paranoia:
How long before I'm jailed for saying evolution is junk science based on incomplete data being manipulated to a pre-determined conclusion.
Oh, look paranoia -- another common hallmark of the anti-evolutionists.
Here's your answer, kid: It'll never happen. Spewing false and ignorant propaganda isn't a jailable offense. It does, however, have the built-in penalty of revealing the speaker to be an ignoramus.
"It does, however, have the built-in penalty of revealing the speaker to be an ignoramus."
Look, the personal attacks I thought would come.