... "WARNING: 600 Ohms".
Ahahaha! I love it. I'm going to make one!
... custom Caution (Do Not Stop On Tracks) tape ...
I want some of this too!
--
A little more seriously... OMG the horrors you guys have reminded me of!
I've used the Decoy Stand method and like it. If it's the first thing they can encounter or grab, they usually do and by the time they've done that I can get between them and the real stand (or the whole TS).
Bits of very reflective tape on the stand do help 'cause then people can see it and (normally) that's half the battle. If they're on their way to being drunk they often just don't realise that there's stuff on the floor that they're about to step on.
I tried glow sticks and necklaces and christmas lights but, yeah, people want to touch the sparklies! (I'm all for the decoration in the middle of the TS though...)
I have marked out boundaries in big halls (with concrete floors) with white duct tape. It doesn't prevent anyone from crossing the line but, if done early enough, will seem "official" and help create a social barrier that most of the rest of the crowd will respect and support. (Hey, they want to keep their half-open and protected position too.)
Really though, the thing that I've found that works best for me is to have a decently bright flashlight and to help the people get what they want *so they go away sooner*. One time a drunk walked up to the TS and was yelling into all of the mics at his sober acquaintance in the balcony. She was trying to ignore him, but to get him to shut up I flashed the light at her until she waved to the guy and could move along.