I think once in my 2 years here at XJT. But that was last summer when we were really lean on FOs. We've been fat on FOs ever since so it hasn't been a problem. I've also been hijacked once at the end of a pairing but I got my 150% and an extra day off out of it so it wasn't terrible. The hijacking I had no choice, they had a crew tracker and a van waiting to whisk me off to the next gate. Must have heard me tell the captain I was gonna "go stealth" when it came up on the ACARS.

Easy way to solve both problems: if you answer the phone at home, tell them you have been drinking. For a hijacking just tell them you're fatigued/getting sick.