Borderline criminal......please continue with more details! If I followed my son's coach to his car, I am quite certain my son would not step foot on the field unless it was to rake the infield after the game.
Haha, mine too! Or they'd pat me on the head and ask if I was lost.
THAT GUY has learned the following, though he still won't go away or make an effort to behave:
If you get into a fight with an umpire at the youth level, you will be banned from coaching at the youth level.
If you take a whole team to a country club then say "bill the school" you will be banned from volunteer coaching at the school (and lucky the school doesn't sue you in my opinion!)
IP addresses are trackable so if you set up a dummy email address and impersonate another coach to criticize other children while promoting your own, it is easy to track who sent it (although the email content makes it pretty easy too!). This is especially true in small town USA and you should probably pick a coach to impersonate who isn't good friends with the coach you are emailing.