We had a problem with a parent talking trash to my kid at the tourny director was right there "he did nothing" so the following weekend made a phone call had 3 of the biggest ,hard friends of mine show up I walked up to the parent told my boys "this guy says one thing to my kid put him in the hospital" I proceeded to shake the parents hand and said "lets watch the kids play"
The parent behaved very nicely with just a warning .
My child won all were happy and from there on out that parent showed the utmost respect for us .
Threaten physical violence if things don't go your way. Nice lesson for the kids.
"More Sureshs, less Maxima for a better TT." - Power Player