I have too. Not recently but numerous times in the "we expect you to extend without having to tell us unless you call in fatigued." They would reroute you into already delayed flights. They'd change the late flight to on-time, reroute you into it, then delay it again usually do to late aircraft or flight attendants so the on-time was never really possible. Just doing it so they can say it was legal when they built it. Now it's so easy to refuse extension, I would assume this practice has stopped, but nothing surprised me anymore.