A temporary organization with a specific goal and limited scope is so close to the bottom of the authoritarianism scale it might as well be anarchy. You wouldn't really call Pinochet a liberal because his tariff policies weren't as strict as Hitler's (
unless you're Hayek himself.) As for socialism, well in the anarchic sense you could argue that charity is a form of socialism, that in lieu of the state you have organized a rally where some chip in and others receive. But strictly speaking, the means of production does not change hands in this transaction, so it is politically neutral on the economic scale. Even Ayn Rand favored charity as the only acceptable (although disgusting) act of redistribution in her works - so I guess we can say no one is truly against it, save a few antisocial scrooges.