Topic: Suspicion of downvote abuse. What to do?

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?

Report a (one) post you suspect of vote abuse, and mention any other related posts you think may also have the same problems in that same ticket
The staff aren't going to roast you over a fire for putting your hand up and saying "hey this seems weird"

If there are shenanigans going on the votes will almost certainly be removed and records handed out, else everyone will just move on with their day

Before reporting you should consider factors like content and sentiment surrounding the character, if the content or character are controversial then they're likely to garner random downvotes
Not that this would make targeted downvotes okay, but it makes it much harder to actually get people for abusing votes

Sometimes, entire franchises/copyrights are hated. >:)