I work for a local government, and we're all salaried. There's no OT or official provision for compensation leave. Our stupid payroll system requires us to fill out a time tracking form, even for salaried employees. So, everybody has to fill out 8's all the way across. Since we're IT folk, we'll work too much if we get into something. Unofficially, as long as we don't save it for too long, we can announce we've been there too long that week and take off early. You still have to fill out 10 8's M-F.
I've done the death march thing. It results in shitty code and should never be done.