A couple comments from reddit that I think sum it up nicely...
"Problem here isn't with cloud comps. It's with a stupid kid that thought it was smart to take a clone and modify the switch. His modifications caused a catastrophic failure with the battery. Even as much as I am anti clone, the mod that the clone was copied off of was designed in such a way that I have ran very low sub ohm builds off of without a single issue. That's because of the way it is designed. The clone is damn near identical in design, but not materials. Now, this kid modifies the switch in a way it was not meant o be modified, and now causes a fatal flaw in the design, and the outcome is an exploding mod. Blame this kid for screwing up severely, not the entire cloud chasing members of the vaping community. It's user error, because hell, I've seen eGo batteries explode because someone bought a cheap knockoff and left it on some knockoff charger overnight and it shorted and exploded."
And...
"it started to fire in his pocket, he pulled it out it started to spurt from the battery, he tried pull the battery but couldnt because the delrin had melted it shut.
0the kid flipped out and dropped it, and ran. it hit the floor directly on the switch and popped. most of it launched like a bottle rocket and took out a ceiling tile, which fell into the crowd and nearly took out a vendor. you could hear the thing blow from all the way across the event. nobody would say who he was, everyone said they didn't see him or didn't know who did it. the rest of the mod went shrapnel and some of it melted part of the floor.
this kid wasn't in the cloud contest, but realize that these contests glorify behaviors without proper explanation of them. perception is reality.... all the kid in the audience sees is 10 seconds of a guy blowing a huge cloud. he doesn't see the guy checking his build with a meter, cycling his batteries and marking ones with how many charge cycles they have on them and throwing away ones that are damaged in any way. unfortunately a lot of people make money off of these contests so i don't think they will stop.. however i think that regulation and a huge media blast is more than needed at this point. luckily nobody was hurt this time. next time, a piece of a mod might be in someone's skull.
if you're a shop owner, manager, or employee it is your duty to try and show these types of vapers the right path. i replaced a damaged battery out of pocket today for a kid that was rocking a half-vented samsung yesterday. a temporary fix, but when the battery costs 4.50 - 8.50 depending on your supplier, that's a small investment in the health of a young vaper, and the well being of our industry. i'll be damned if i'm going to let anyone ruin this so i can go back to 2 full time jobs to not make ends meet."