That was a problem with black market and unregulated Vape production, especially in the early days. It was never widespread, it just happened in a few places where people were buying vape products off of some random guy on the street. This was mostly a problem when this stuff first came out, because there wasn't a lot of legitimate companies making the vape juice and cartridges at first.

I do agree that we need regulation on the disposable vapes just for the amount of trash that they create. Disposables are so much worse for the environment than refillable vapes.