I'm in his group in that server. He bugs me all the time to do ti and sa but never knew he was like this. I've been debating whether or not to leave the group and this gave me the final push. I don't know how to report but good luck on finding out how! If I find out I'll edit or do a new reply.

I found out where to report. To report you have to fill out a form

https://forum-narutoen.narutowebgame.com/page/show-post-22193-1.html