防犯シール warning notice

公園のトイレのドアに貼られたシールです。防犯用とはいえ、トイレに貼るのは不適切だと思います。

It is a notice put on the door of a public lavatory. Though the purpose is to prevent an immoral act, it is not appropriate to put it in a lavatory.
The notice says that you are seen.