There is no need to get out of anything. You're just angry because you got fooled by a little wordplay.
No, you're scared shitless the feds will bust down your door so you did what countless people before you have done:
Sure you can later claim it as a "troll" if you get figured out.
http://www.thesmokinggun.com/documents/internet/another-4chan-user-gets-busted-fbihttp://news.oneindia.in/2009/01/10/internet-death-threat-to-obama-leads-to-southern-californian.htmlI don't care enough to report some guy in his moms basement looking for some weekend excitement because he's out of money, but someone else probably does.
Hell, the cops don't care or know if you're just "playing a joke" or "actually talking about rats u mad lololo"
All they need is the original post as evidence even if you claim 'prank'
(TL;DR: I'm not going to report anything, just saying cover your ass before making dumb jokes unless you want to be just another statistic)