A quick thought... 

...Hi again, I interacted with you at WP:AN.  Just wanted to say that I think the ban is a good idea.  I don't think being biased against all IPs is.  But on a more important note, after reviewing the  vandal's activities thus far, the person/group appears to have no intention on stopping.  His/her writing implies that s/he is educated and dedicated (s/he corrects his/her grammar at times).  This shows me that this person  will be a real pain for a while.  Good luck on fighting a troll.  P.S. My phone won't let me log on.  I have an outdated browser or something.  Once I get home, I'll join the anti-Zarapastroso  fight.  Best wishes to you!