I dislike posts that were already posted. It's wrong I know! But I can't help myself.
Why are you disliking the posts?
I think they're copying my posts.
Disliking posts because you are unsure if they are copying you is not fair. Imagine if someone disliked your posts for this reason, you would not like that at all.
Whatever - I don't care.
This is something you should care about. You want people to be fair to you, so you should be fair to them by not disliking their posts for no reason.