The only time I ever ran into a glitcher was last year in a silver game, you can't explain that.
I've had a similar experience on X-box, believe it or not.
I joined a W9 game in progress on silver collectors goddess and did my thing. I noticed a few missiles in the killfeed, but I just thought it was someone spawn nuking, nothing new.
W10 starts, and we get a hack objective, letting me see my team-mates up close for the first time, and I see a N7 fury with a striker.
I still didn't put two and two together because she didn't fire her gun once, just spammed dark channel and throw while popping in and out of cover, which is reasonable. I figured it was just someone trying out a new gun and discovering that it sucks quad.
Then she starts nuking everything after I've helped them complete the hack.
Needless to say, I spent the whole of W11 hunting for A-bombs to kite into the evac zone.
Seeing that fury panic and nuke the lot at point blank was priceless. 