Or Free Republic, for that matter? Well, Linda Sanchez (D) thinks it might be a good idea.
(a) Whoever transmits in interstate or foreign commerce any communication, with the intent to coerce, intimidate, harass, or cause substantial emotional distress to a person, using electronic means to support severe, repeated, and hostile behavior, shall be fined under this title or imprisoned not more than two years, or both.
So, let me see if I understand this. If I go onto Daily Kos and start accusing the posters of being godless communists bent on destroying the USA, using withering inflammatory insults ("severe" and "hostile"), and I do so in a "repeated" manner, then according to Sanchez I should be thrown in jail.
Of course the intention is to stop 'cyber-bullying' among kids. But here is a pretty obvious case where the proposed action upon the intention will have significant unintended consequences that threaten everyone's liberty.
H/T: Corner, Volokh