Here (in France), the most common argument against voting is to not feed the arguments of "Democratic Legitimity" of the elected that was used during direct actions. That was a thing, but 30 years ago. Now, the proletariat mainly do not vote, and even through the workers that does, it is very common to here that it is pointless. So we have won. I am serious : the anarchist propaganda that aim to demonstrate that the election is a fraud is now common in our social class; this not an argument that mobilize workers against direct action.
Is the election still an issue for our mobilization ? Yes, but indirectly : it focus all the discussion and the information a year on five. It is impossible during that time to mobilize a public opinion on anything else. Talks about political parties and if we should vote or not monopolize every political topic from the media to the workplace or with friends.
If voting is pointless, to vote or not should be pointless too. Why add to the election noise in asking to not vote Q I make a deal with commies that ask me to vote : I accept to vote for a left party if they never talk of the election (or if it is very late in che campaign, if their unionize).