Small correction:  Disagreements about content, are not vandalism.  We reserve that word for blatant deliberate attempts to compromise Wikipedia, such as page blanking, inserting profanity or inappropriate pictures, etc.  See WP:VANDAL#NOT.  What's going on here, is a content dispute.  Possibly tendentious, possibly disruptive, possibly just a difference of opinion. It may even lead to restrictions on one or more parties. But it's still not vandalism. onka