Protest against corporate involvement in politics

I had an thought today and I wanted to share.

The idea is for just one entire day, to end all financial involvement with companies which unreasonably participate in political discourse. I'd like us to pick a date on which everybody goes to their financial institution and takes our money out (this idea came from Wisconsin), moving our business to smaller community banks.

Additionally, people could cancel subscriptions to AT&T, Comcast and other ISP's which have an uncomfortable interest in the future of the internet. Often we use companies we hate because we have no other legitimate option, if it's too much to completely end service, just call again tomorrow and re-instate. Even if you're not currently signed up for service, call anyway to cancel something in the future ;) I know yearly contracts can make this difficult, but perhaps enough people could participate to make it worthwhile.

An entire day dedicated to voting with your dollar might actually get some momentum going, and will probably make people more conscious in future purchases.