Quote Originally Posted by Jerry Garcia 2007
Bombdigity,

It may harm a few roots out of hundreds, so it is so minimal that the plant never even notices. Put it this way you could compare it to a pin prick.

Keep in mind a MJ plant is concidered a weed and is very resiliante to almost anything you can throw at it.
Another option is for him to drill a few holes in the rim of the pot to tie down his plants. Though be careful because doing this will weaken the strength of the rim of the pot.

Personally I'll be doing the wire coat hanger method next time. I tried bamboo skewers and yarn.. didn't work out so well last time. Got the job done but it was admittingly a pain to do it that way.