Just a note on personal fundraising threads.
Although many are for a worthy cause the site isn't set up functionally to support any degree of fairness in deciding who can or can't post fundraising threads. Second, as it's a deal forum I don't think having loads of threads asking for money is within its remit.
Third - I do think that it flirts a little closely to chugging. Asking your friends/acquaintances for support is all well and good and if you are friends with people on the site you could PM them for support.
So yes there are good causes but unfortunately this is not the best place to solicit support.