Message about disruptive user  

 I am not an administrator so I cannot block the disruptive user. You could report this person to Wikipedia:Administrator intervention against vandalism and/or Wikipedia:Administrators' noticeboard/Incidents. I must say that there are several possible reporting noticeboards which makes it a little difficult to decide which one to use for a problem that involves more than one issue, but I think the above two are the most likely for this one. You can see other suggestions on the general or main Wikipedia:Administrators' noticeboard page.