The building has high end companies in it, its not like a machine shop or something. I would really hope they would know that when the bathroom is open with a yellow sign saying not to enter in front of it, that they wouldn't enter. I assume everyone in the world is an idiot, but this is going to far.
The end of the email said they would be starting at 5:30. When I left yesterday, there was a large yellow sign blocking the bathroom stating it was closed. I am really glad I was told the meaning of that.