I almost hit a glider in cloud a few years back while flying a twin in the descent so take nothing for granted including your airspace.
I kind of agree but if you're plummeting to earth at 120mph you haven't got the chance to getting out of the way. Someone who
looks like they may be about to infringe a drop zone is already too late if you're taking the minute or so drop from 15,000'. I was lurking about the general area of Langar last year when I heard a guy give his pos rep as 'Overhead Langar' to East Midlands to which East Mids gave the reply 'Live drop live drop vacate immediately'. But if you're overhead any way is the quickest way out. I just can't get my head around some pilots, who the hell would fly over a drop zone unless they were specifically told it was cold?