"If we do go to court over something sent -- you will end up showing a screen shot or a copy and pasted text file. Those will be tough to support in court."

I'm not so sure about that. If you leave enough incriminating evidence in the note itself, it wouldn't take too much to convince the jury or judge. For example, if you write something that only you had knowledge of in the note, then it can be used as evidence to convince the jury that you wrote it.

This site is a good idea but should be viewed as part of an overall strategy.