Ladies' bathroom

I am going to be completely honest about what crosses my mind in the ladies' restroom.

Lets say you go into a stall and once you are in there and have locked the door, you realize that the toilet isn't very clean. If there was a line for the restroom (and there always is), you aren't going to leave the stall unless it is REALLY bad, in which case you probably noticed before you got all the way in.

So you do your stuff and avoid the toilet seat at all cost. THEN, here comes the bad part. When you leave the stall, someone sees you, maybe even makes eye contact with you, and goes into the stall you just left.

Their immediate thought is, 'Whoa, disgusting. And she looked clean!?' There should be an universal sign or symbol that you could give the next-in-line to let them know, 'Hey, I didn't do that. And, I was too disgusted to clean it for you without gloves and bleach.'

What do you think?