Voting is a simple, automatic process. Your wallet would have a pop-up when you configure it asking what you want your vote to be and giving a bit of education on what the option actually means. After that the process can happen entirely automatically. Submitting a vote doesn't cost you anything in time or money and unlike leaving the decision 100% up to miners it ensures that entities like the Winklevoss twins with the connections required to get access to mining hardware on a level playing field, BTC to BTC, as you are. (Mike Hearn for example has said he expects for mining hardware to be highly regulated in the future)

Frankly what are you guys worried about? Losing? If Bitcoin users really want a large blocksize they'll vote, and it'll be easy to convince them to vote if they see fees going up and want fees to be lower. Voting is an excellent answer to those suggesting that politically powerful members of the community are pulling strings by taking the issue out of their hands entirely.

Gavin Andresen has said repeatedly that he doesn't want to be "the guy" setting the blocksize. Others, including myself, have said repeatedly we don't want the tiny set of large pool owners setting the blocksize. With voting both parties can be made happy.