Interesting. I was the Ops Officer of 38 (Berlin) Field Squadron RE and as so had full and regular access to a whole bunch of Secret documents. NV was sufficient for that. All officers were NV as a matter of course.
But, because it was an independent squadron I was also the RSO (and the IO). It was because I was the RSO and so responsible for a few pads of BATCO and the two Clansman BID fills we had, I was PV'd. Not because I was the Ops Officer. I was an IO in a later EOD job and still had no requirement for PV then, even though I was in regular contact with Tech Int (Army) DI59b. PV was only for 'regular and unsupervised access to TS' and given that war plans etc were only Secret, there wasn't much call for regimental officers (except the RSO) to be PV'd.
I was then PV'd again when I went to work in MB, it's an expensive process and there was no point in doing it when it wasn't needed. I therefore don't agree that PV was 'routine' for ops officers.
Well put @bob_the_bomb. An individual enters a whole new world upon the successful completion of the DV process, as you are well aware, all based on the simple 'need to know'. @John G was unlikely to have been part of it, probably much to his chagrin.
You're right, those with possible mental issues should not be mocked. It's difficult to draw the line between banter and bullying, not helped when the individual fights his corner in an antagonist way which leaves him open to ridecule.
He's rather going to come back with a tsunami of lies and bollocks, or he's going to try slide back in under the radar - possibly with a new account. If it's the latter he'll be outed quicker than Corbyn in a synagogue - he can't help himself.
I personally hope one of the mods has hit him with the ban hammer for 99 years!