Welcome to the forums.
Unfortunately, the PEI section is very nearly moribund, so I doubt that anyone will be able to answer your question.
As for how specific you can get online, I would say that you can get as specific as you want. The only proviso would be if you have inside knowledge on a project, and if publicizing that knowledge could put the project at risk. You would have to be very careful about that as there could be legal implications if your identity could ever be established.
I am not aware of anyone on the forum ever getting in trouble for that though....