Well?
I never have despite the amount of time I've spent thinking about politics. Anytime I consider it, I tend to jump to the conclusion that my donation money would be better spent giving to the Church or to charities than politicians, but maybe someday I'll be persuaded otherwise or give despite that. I also suspect that whoever I'd give the money to would only be using my support by giving lip service to issues I actually care about and not actually do a thing to make the world better in any tangible way.
How about you guys?
I still have a membership in the Conservative Party (5yr membership bought 3 years ago), but feel the same way as TJ.
Being involved in politics lets you see the lip service he alluded to up close and personal. I don't really see the point in being involved in mainstream politics anymore as I get older. The combination of immoral politicos, my views being pushed aside in favour of free market ideology, and the demands of family make it quite unpalatable.