[SeaWraith]

Well, the emote-rp shouldn't have a definitive outcome. A better way to do it would be:

Joe: *casually tries to trip Jane when she walks by*
Joe: *attempts to spit on Jane's shoe*
Joe: *tries to slap Jane on the back while she's eating soup*

This way, at least, the other party involved has a say in the matter, or dice-rolls can be made, or what have you.

I've played on servers where an emote *punches x in the face* is considered PvP, and was a bannable offense, so having the outcome less-definitive is the least you can do, and it works pretty well. So long as everyone remembers to do it.