I have been posting stuff on her page the last two days, she seems to be one of few politicians that you can actually post stuff to, not just comment on something they posted. I haven't seen one anti posting their support on there. I know it won't change her mind at all, I don't expect it to. What might happen if everyone begins posting on her page, Obama's page, Reid's page, your own state politicians' pages and they get completely bombarded is that it may at least make a news story. Get the opposition out there, make the people left on the fence, or the ones that just fell on the wrong side think about their vote on this bill a little harder. The thing I like about posting stuff on their facebooks in addition to calls, emails, letters and faxes is the entire world sees it, not just their office.
Post reasonable arguments, post facts, don't post things that make us look stupid or violent. Post a NO, post why you think its wrong, post the bill of rights. Email, call, bombard them with faxes, snail mail letters. Don't forget to reach out to the pro gun politicians, thank them for their continued support.