I don't know how/if it helps the collective, but sites that behave this way receive a "Mark as spam" on gmail from me. It more or less guarantees that I never s

I don't know how/if it helps the collective, but sites that behave this way receive a "Mark as spam" on gmail from me. It more or less guarantees that I never see them again, and I guess if enough people mark them as spam they'll actually get caught in the "global spam filter"?