Nah. That bot is so insignificant that you'll get more votes up than it can come close to cancelling. Right now that vote is costing you $0.04 in potential votes.
This is a decentralized network. Letting them know won't actually change anything. There is no authority to do anything about it other than to perhaps do the same type of thing.
That just results in war.
Overall, the easiest thing is to ignore it.