I just wanted to clarify what Cullin Kin wrote..
A bad time.. your atty would short. on an decent quality APV, its not as big of a deal.. though you wouldn't get vapors... which is the whole point.
On a mech you could blow your battery, which could end catastrophically... (kaboom goes the mod).
as far as clones goes.. I think all my drippers are clones... I dont vape super low ohm.. usually between .7 and 1.4 and I've never had an issue with the insulator with one caveat..
I had a smoketech squid (or something like that).. it was a piece of garbage. the center pin of the 510 got pushed up a bit by my mod - the 510 center post was the center post on the build deck that was just held in place by some cheap rubber insulators. they weren't a good fit.. i had to push the post down periodically when using the
device... It didn't warp or melt as far as I could tell, but it was loose enough to work it self up ( and it would start to spin if I tightened down the positive connection too much..) ... anyway, only used that sucker for a weak before chucking it...