How do I stop a user changing the categories of my question?

I have had dozens of my questions changed to the category "Abuse and Spam" from Global Warming. Is there a way to report this sort of abuse? One question has had it's category changed perhaps 30 times today.

I'm fairly certain that the user goes by the name "Dr Jello".

2014-12-16T18:11:55Z

its not "it's"

Kano2014-12-26T15:48:36Z

No it is Yahoo, you have to be level 7 to be able to change some elses question, I don't think Jello is,
It happens to me as well, especially before anyone answers, once I get an answer or two it settles down, it also helps to have either "global warming" or "Climate change" in the title.

Anonymous2014-12-16T18:43:29Z

You seem to be spamming Yahoo with the same types of questions. You have a question from 4wks ago that mentions the name "Dr. Jello." You are pretty much asking for trouble if you keep calling out another user. Your questions change categories because you don't seem to be a serious user & other users move your questions to another section to get them out of the way.