I've done this, I wouldn't exactly call it cheating, in Bank Heist if you go out of the map the alarms go off, and in Election day if you fall into the water you freeze, and you can't win. On day 2 of election day you can also fall out of the map, and unless you die, you also can't escape. If you want me to whip it up for you, PM me. It's useful for certain things like cook off, how the ammo past those invisible walls is unattainable, although some weird things have happened while using it. I haven't tried it on Go Bank but I'd imagine it would be pretty useful.

OR!
How about you not use hacks to get out of the map. Glitches are one thing, but literally using mods to hack your game so you could teleport out of the map (and I honestly don't care if you get stuck out of the map, it is still hacking the game to allow you to do that.) is not allowed.
If you use this type of thing online, it is literally against the rules on both this website, and what Almir states is allowed and what isn't.
Rule number 7 of this website states;
Do not ask for or discuss cheats or pirated content.
I kinda want this thread closed because of the fact that what you are asking for is cheating.

It just disables invisible walls so you can exit the map, it's not teleporting, or cheating, people could literally do this just out of curiosity about what's back there, there's glitches to get out of the maps on some levels too, and I also don't think one civ outside of the map should be the reason anyone fails a heist, it's cruel imo. On a side note though, maybe you could let me a consumer who bought this game with his actual money, along with all the dlc, play the game how he wants to. You may not agree with it, but who are you to tell me what to do with a product I paid money for? It's not like I'm spawning bags, or using godmode. I'm not gonna argue anymore about whether or not no invisible walls is considered cheating. I don't believe it is.

You can make your own custom map without invisible walls, sure. Go for it man, but if you want to hack to remove all the invisible walls, take it somewhere else, mate. If a civilian runs outside the map because you weren't paying close enough attention, get better at the game and pay more attention.
Do whatever you want with the product you paid money for, but keep the cheating outside of LB.

https://gfycat.com/SnappyBlueAnt (don't mind the speed. gifcam fucked up the encoding)

"If a civilian runs outside the map because you weren't paying close enough attention, get better at the game and pay more attention." hum?
im all in favor of this, if i payed money and bought the game (which is not competitive in any way, quite the opposite actually) i should be able to mod these types of glitches off it. because these are, without a doubt, glitches.

if not glitches they are bad map design, which is equally not the players fault.