I'd argue that voting predominantly for one party or another doesn't identify the unaffiliated individual as a member of the party who's candidates they vote for. It absolutely doesn't identify the whole unaffiliated voting block as having any secret party affiliation. Telling the whole party system to take a hike is an active choice and it happens in counties that only allow a single political party as often as it happens in countries like the US where there are only really two choices.