I met this guy who tried it out yesterday on the map Terminal, he said he found that exploit code on Reddit. He wasn’t taking advantage of it though. As soon as he knew it was an exploit, he stopped and switched to another merc, so no need to worry about him.
Anyways, when he did that exploit, the turret killed me from my opponent’s spawn to my spawn, through like 6 walls. I don’t do Reddit, so I do not know for sure if this code is really from Reddit. He simply just put the code into the chat box and it just enabled it. I do not see another topic on this so I decided to mention this so it could bring attention.
Apparently, There's an Exploit Code For Bushwhacker's Turret Which Enables It To Shoot Through Walls
This sounds like one of those “I have a friend with a problem” and the friend is actually the person talking 
FYI, there’s a spot on underpass where the turret can shoot through that black wall and kill any attacker running around in their courtyard.
So if you see a turret on the roof of the first bomb site facing that black wall-- it’s an exploit.
Thought I’d mention it here just in case you see that too.
[quote=“triteTongs;63641”]FYI, there’s a spot on underpass where the turret can shoot through that black wall and kill any attacker running around in their courtyard.
So if you see a turret on the roof of the first bomb site facing that black wall-- it’s an exploit.
Thought I’d mention it here just in case you see that too.[/quote]
That’s not necessarily an exploit as much as it is bad coding. Same for the wall on Terminal near the first bomb plant.
It’s been reported on Underground:
http://forums.dirtybomb.nexon.net/discussion/comment/62277