I would like some help, please.

This is related to Naruto, but I won't specify which Naruto-related spot I'm talking about. I made a spot dedicated to a character of Naruto, and some nobody just came on and they're bashing the character on dicho spot. And apparently they went out of their way to specifically bash that character on dicho spot. I DID get angry at first and say some things, but I have asked them that if they did not like the character, would they please stay off the spot and not say anything? Since it's a spot for the fans of that character? I have no problem with people expressing their opinion (so long as they're respectful to people who like what they don't like), but this person is putting anti things on the spot of the character just to piss the fans off. I asked them if they were actually looking for trouble, and they basically says yes. So they're harassing the character and the fans just for the heck of it.

I would just like to know if I could borrar what they put and somehow block them, since I'm the spot's owner. I'm just sick of this, and I think I have every right to do it. If tu happen to find the spot I made and dislike the character it portrays, I DON'T CARE. But please just leave us to our fandom, that's what I do with people who like things I may hate with a passion. Please, it's our spot.

Here's the link to the person harassing: link

This may seem pathetic. It is. That's why I want it stopped. I keep asking this person to stop, and they just keep adding useless anti crap on my spot. I'm sick of arguing with this person who obviously needs a freaking hobby and life.