I voted 'good idea' but honestly probably not something I'd do to my stand. Glow sticks...are also a good idea, but I usually just stand near my stand and try to remember to use a flashlight to illuminate my stand legs so people walking by will see what they're walking around.
I do think stand legs form a tripping hazard that tapers have a responsibility to somehow protect. I don't really think someone is stupid for tripping over something that's typically black, easy to trip over, and usually sitting in darkness at foot level. After all, they're typically semi-tanked anyway. YMMV.