So, what should I do if I suspect that this kind of activity is taking place?
Reporting something that may be a product of my imagination doesn't seem like a good idea.
I just don't have any tools to detect this other than observing the votes, and it only works with unpopular tags
There is a little-known character here who consistently receives single downvotes, and I'm not sure if someone really hates him or if it's just a coincidence.
Also, if the suspicions are confirmed, will these downvotes be canceled or will they remain?