That’s how it works if they are monitoring the hash tag you use, such as #withNewt, they will see your tweet. You can post negative stuff about Romney and Obama and tag it with their hash tag.
https://mobile.twitter.com/searches?q=%23withNewt
You can search twitter by hash tag without having an account.
SusanDuclos RT @FreDude1: Nevada likes Harry Reid, Mitt Romney / South Carolina likes Jim DeMint, Newt Gingrich. #SC #WINNING!! #withNewt #Newt #tcot #teaparty #gop
9 minutes ago