It's not about entitlement, it's about treating your CUSTOMERS as well as you possibly can.
When you put a uniformed crew member (int'l crew rest arguments aside...) in a first class seat and then parade 125 PAYING customers on by to wedge them selves into their seats, your airline has just pissed off 125 PAYING customers. It doesn't matter what they paid, hell a full Y fare can be more than a FC fare in some circumstances. Hell I've seen 219$ FC fares before, you can bet your a$s there are coach customers that have paid more than that.
I'm not advocating that anyone lose their 'perks' but to say that an airline employee is entitled to a FC seat over a paying customer is asinine. Just another example of why service on US airlines at best a joke- the attitude that your CUSTOMERS are just cattle to be herded around.
Why can't the airline find a deserving soul for the FC seat and put the non-rev in the back? When a gate agent offers me FC, I'll say no thanks, or, if there is someone deserving in the boarding area as in a servicemember or a vet, then they get the FC seat offered to me. The most deserving was the woman holding the folded American flag.
-Barnyard