Makes no sense to me. I agree with Wotan and support Grun.
If you cast a vote for BS, you will continue to get BS.
Voting for the sake of voting may make the "apathy" quotient less salient, but the apathy is a voice, a vote, in and of itself.
It speaks of indifference to what's being served. As a result, in the future an otherwise unheard voice may get heard, and a change from the BS offerings will result.