Thanks for the reply Scroggs (and ghost rider). I guess it comes as more of a surprise to you long haul chaps. The guys who fly the domestic routes are well aware of the restrictions, having to fly them day in, day out. In fact many of them try pre-emptive strikes: 'Is the MARGO restriction in force?' is a common question from the Scottish TMA inbounds. (It usually is BTW)
I believe these expected restrictions are published on the STAR charts even though we ATC types will apply them all the time, some of the time or not at all. Of course, some restrictions are applied well before the commencement of the STAR so might not be as apparent to pilots or ops guys.