England is by far the worst area in the world for un-necessary noise on guard.
Absolutely untrue. Aside from the occasional practice pan, it is quiet. The cat-calling and childish behaviour is almost always in French airspace.
Since the advent of FMC and EFIS and relying on these items rather than looking at charts the level of situational awareness has decreased
In my much derided airline we have numerous procedures to guard against PLOC. For instance, our PLOGs clearly delineate FIRs and it is SOP to note boundaries in the FMC so as to provide reminders. But, yes, paper charts are so rarely referenced that many newbies are unaware of the wealth of information therein.
Are there certain geographical points where this is more likely to happen
That's a good question. Again, in my airline, we have been provided with charts showing where PLOC has occurred over the preceding years. The key hotspot is the boundary between Rhine and Maastricht airspace in western Germany. Another is between Bordeaux and Madrid in the Biscay. I'm sure there are many.