No. Reddit is quite open and pro-free speech, but it is not okay to post someone's personal information, or post links to personal information. This includes links to public Facebook pages and screenshots of Facebook pages with the names still legible.
We all get outraged by the ignorant things people say and do online, but witch hunts and vigilantism can hurt innocent people, and personal information found online (and elsewhere) is often false or out of date.
Posting someone's personal information will get you banned. When posting screenshots, be sure to edit out any personally identifiable information to avoid running afoul of this rule.
Public figures can be an exception to this rule, such as posting professional links to contact a congressman or the CEO of a company. But don't post anything inviting harassment, don't harass, and don't cheer on or upvote obvious vigilantism.