Nobody is really doing that tho. The game has been out so long and people who still play it faithfully aren't letting anyone run all the way outside and kill shyt without getting blasted.
Every round that starts, everybody is watching the popular peaking spots. Only scrubs continuously getting trapped in spawn. Ubisoft even tweaked the Attacker's spawns so that nobody is vulnerable right when the round starts
I don't know what it is but within the last month or so I've seen it more and more.
Especially on the plane stage. I've seen games where 3 people get dropped 10 seconds into the game.
And I'm no scrub, I don't get hit by it but my teammates do and that of course causes a handicap.