Making the world a better place by being insincere, guilt tripping, standing in your way and otherwise ruining the scant half an hour of freedom and peace from work you are allowed. Oh, plus chuggers are mostly paid by ad agencies who take majority cuts from money donated... so its essentially some agency fat cat paying backpackers to beg for him. If its oversea work, most of the remainder goes into bribing officials and warlords, or in the case of health research charities you pay for research so a pharmaceutical company can then sell you back the treatment for ridiculous amounts of money. Charity? Get f $#@ed.
Ooh... I confess you made me rant. Bad you.