Can't force people to vote for the witness but I know that speaking for myself I didn't even know that the community was even running one. So anything that gives people the option should make a difference. Even a link at the end of the engagement post with a quick memo would help.
I've seen that a lot of the entrants don't even have all thirty of their votes used so i'm sure if they were prompted in the right direction they would be more than happy to use that vote to support.
It's been at the bottom of the League post for months :D
I may put a list together and contact people who i think would be ok with it individually...
Good thing i'm new or that would be a lot more awkward..... :)
I've only seen two posts. Lets go with your idea instead.