We probably have much of that information collectively here, though. People might prefer not to say precisely what field they're in on the public forum, or, come to that, to express in public unfavourable opinions of departments, though... A possible protocol would be to ask here

"Does anyone know what [university] is like for [subject]? PM me. I'll summarise, preserving respondents' anonymity."

For a poster I recognised, I'd be happy to respond to such a request, where I had anything to say.