I just turned down an offer because of something like this. I went through a bunch of interviews and things seemed pretty peachy, until I interviewed with a guy (who'd have been a peer) who was probably way more candid than management would've liked. He said things like "I haven't gotten a raise in five years so make sure you negotiate hard when you come in", "I got an apartment close to the office so I can be here quick when the shit hits the fan", "50hrs/wk is probably a good baseline, but you already knew that", and "yeah, your group has rotating weekly pager duty and even if they call it an 'engineering' team it's really support."

I felt like I'd been completely mislead by everyone else, and even if this guy had a chip on his shoulder and was intentionally lying to me -- which I doubt -- that in itself would have been a red flag.