To be fair, I’m probably being overly sentimental, but anywhere that is a memorial (official or otherwise) to where people died, deserves a little reverence.
The Bleaklow site doesn’t have any buried bodies, but it’s probably fair to say it’s a memorial.
I wont argue with that - any such site should be treated with respect, be it military or civil. I have come across quite a few in my walking career, some on purpose and some by accident. Incidentally, we have another Canberra crash site near us in Tiverton, It ended up in the Grand Western Canal in 1961 - the site is marled by an information board and memorial.