I'm not 100% but I think 'bleeping' out cursing or otherwise has something to do with the time of day the station airs it.
I can't bear to watch the bastardized version of Casino that AMC sometimes broadcasts!
Not really on cable channels. They have the one edit that's "safe" for all day. Not that it really matters, since cable channels can legally air whatever they want, whenever they want. FCC can only regulate over-the-air channels...which these days only really includes the major networks.