This is a 50/50, in some circumstances it's ok, but in some it's shady as fuck.
I've done it, BUT it was a night game, I'd gotten in to the large enemy encampment & casually strolling around in the darkness as if I was meant to be there was the only way to access the HQ building (& blow it up lol), game over & everyone laughed at my audacity, no complaints.
But to do that in broad daylight, I think I'd get the hump too, & let's be honest, we've all got the hump when being repeatedly shot when doing the "dead man's walk", if people started pulling that shit regularly, it'd soon descend in to chaos, dead players being hosed just because they didn't look "dead enough" lol
Edit ps just seen that cyberlawyer has made the same point regarding dead players, soz🤪