Mark is definitely the nicest dude in blink. Travis donates a lot of money to that burn center that saved his live and Tom donates to and promotes Keep A Breast though too.
They are just charitable guys. Going to pick one of these up if they're released in the UK. Also, the last gig they were going to play before they broke up was in aid of the Aisian tsunami in 05, but ended up finishing before that. Amazing guys though.