So this happened on my PL 160 mission today:
A Spanish-speaking player in a lobby, unaware of how AFK builds work, and a teammate was mad at them for it and destroyed their traps and started the mission. Then they boxed the player and trapped them, and started abusing them pretty bad for wanting to play the game as it's intended. This is straight-up bullying and I left the game once it was failing and didnt realize that that took away the option to report them.
(I still have the full screenshot with names if Epic needs it because such players really need to be banned.)
Look, I have nothing against AFK itself, people can choose their own way of playing. BUT the thing is, when you AFK in public or private, it doesn't cost you any extra resources or effort, plus they're very resource-friendly as it is. AFKing should only be for public missions where EVERYONE accepts to do it, OR in private where it costs the same resources and no one is forced to play accordingly. Also not everyone knows these builds and you aren't even expected to, considering 99% of the stuff in the game – weapons, traps, defenders – exists to damage and not to stall enemies.
Damage builds cant do that. With damage builds, having teammates is a huge help: people can tackle different spawn points, the game is built to give your teammates PL buffs, you can avail the 4 defender limit instead of the 3, everyone can use their own gadgets, and some gadgets like Adrenaline Rush help the entire team.
And most importantly I should add that it's just a game and there's no need to get this mad at someone. If you're AFKing in a public mission without asking anyone, they have every right to damage. You are at their mercy and not the other way around, so don't be surprised if they use the gazillion guns that Epic has given them to damage husks.