I know you know that, but - tell people. This weaponised meme has been going around for a while, being pushed by Trump supporters on 4chan, and it's apparently bad enough that even "eh, whatevs" Twitter is taking action against it. But still.
There are also a couple of fake "online voting" websites which have been set up, such as (the currently offline) www-dot-votehillaryonline-dot-com, which participants have talked about directing people towards.
All of this is completely illegal, by the way.
mic.com article from today