Don't get me wrong. As I've said in my previous post, I could see where tipping may come into play and I do as such, but I'm sorry, I'm not about to 'tip' the restroom attendant just because I had to go piss and/or wash my hands.
Remember, these places that have the attendants are few and far in between, unless you frequent very high end places often. Personally I see a bathroom attendant 4 times a year at most, unless I am on vacation and then it varies. So if you are already blowing 10 plus bucks on a drink, what's a few more dollars?