You shouldn't have to put up with that vandal's games.  Let the administrators know, and they might be able to put a permanent restricted accesses on all the articles you are working on (as well as your personal pages).  That way, you can have the peace of mind to concentrate on the work that you love to do.  I am happy to see that there are people dedicated to writing about these wonderful bands and artists, whose stories so badly need to be told.  It's hard enough dealing with the challenge of finding good sources.  But, to have to worry about some pea-brained vandal interferingthat is unacceptable.  That sick individual is not so much hurting you as the memory of the musical artists you are trying to chronicle. It is shameful. But don't let it get you down.  Keep up the good fight!