Man, we should boycott pools under the same premise. I don't want them controlling my.. hehe.. "votes"...
Have you even ever read Satoshis paper? Why don't you do that now.
http://bitcoin.org/bitcoin.pdfFrom the conclusion:
Nodes can leave and rejoin the network at will, accepting the proof-of-work chain as proof of what happened while they were gone. They vote with their CPU power, expressing their acceptance of valid blocks by working on extending them and rejecting invalid blocks by refusing to work on them. Any needed rules and incentives can be enforced with this consensus mechanism.
Satoshi explicitly stated that doing a proof of work is voting.
And yes, centralized pools are also a problem which p2pool was designed to solve - but at least you know who you are selling to, and you can judge their reputation. With hashpower.com you don't have any idea where your shares end up.
So I will say it again. Do not use hashpower or similar services. It undermines the security of the system we all use. If you don't understand what you're doing by mining you should not be doing it.