Yes you can go ahead and remove these statements on his userpage  If this user continues to make such edits he can be banned however I would like to try and resolve any disputes with users and explain to them the rules of wikipedia rather than run the risk of permanentley blocking someone prematurely  And BTW his current block hasnt expired just yet he still has about  hours left on his block  Thanks for asking me about this Ill be sure to keep an eye on his contributions