quantumslip

That link also talks about reasonable apprehension, which eliminates your belief that any unwanted touch can be considered assault. Of course then it comes down to what's considered reasonable, which is up to the judge and stuff to decide. Being lightly bumped on a crowded subway for example can't be considered assault under reasonable circumstances. Being groped on a crowded subway is. But based on the prima facie list they have there, in this case (IANAL) I would think any charges would not stick.