George, there was a time when I didn't check the thank you box on my ancestor profiles, for concern that I would be encouraging someone whose contribution to the profile would not be what I wanted - because I don't have time to see each contribution in the list.
Then the light went on in my head. "We all make mistakes and assume they are not intentional."
Now I thank EVERYONE who makes a contribution to my ancestor's profiles. Why not? Most of them are very helpful and even if some are not, the person making the change was doing their best to improve things - why not thank them for the effort. WikiTree is a learning experience for all of us, and sometimes we learn from making mistakes.
Next time you open the Change tab on a profile in your tree, why not check all those boxes that are still blank? Those contributions represent cousins who care about your mutual ancestors. I don't keep a 'naughty' list anymore. It doesn't hurt to thank people for trying.