The important thing is that the *last* time Obama tried to overthrow Netanyahu, word leaked out and was seen as an attack against all Israel. The Israelis detest foreign interference in their elections.
So this make defense easy for Netanyahu. His people should make sure that every Israeli knows what these foreign agents look like.
The problem is not that they are recognized in a photograph ... but that they are giving information, advice and strategy to those Israeli politicians who definitely want to defeat Netanyahu. These Israeli politicians will gladly take the help in order to defeat Netanyahu. And remember, it’s already happened once before that US operatives helped Israeli politicians defeat Netanyahu.