It's fine with me because it's an obvious use of zspawn. If by enabling zspawn this occurs, then so be it because it's a tradeoff. Creating a rule against it is pointless - how will you know when a player has seen the locations of the humans before spawning unless they themselves admit to it?
This is where you're wrong, and you've proved my point because you as a longstanding member don't know exactly how the nuke is triggered. Going down the stairs, or even going down the first step has nothing to do with triggering the nuke. Go towards the rear of the roof (I went above the white canopy), without going under the canopy, and you will trigger the nuke all the same as I inadvertently did. Decompile the map and you'll see.