That's a bit of an insult to a lot of us hiring managers! ;) sure there are legal considerations and you have to make sure you don't accidentally do something that could be (maliciously sometimes) used against you (or your company rather) but there are a lot of good people out there and to be honest I will always give a candidate feedback in an honest constructive way (and I'm not a very harsh person so I will also consider their feelings when I say things).