Yeah, in my opinion not worth it, especially with the risks involved. I've purchased several butane adapters to play with. They mostly sit in a box.
The only adapter that shows promise is the propane adapter that I reviewed recently. That propane adapter opens up some new doors. The cheapie butane adapters don't buy you much.
However, I've got one more butane adapter to review, the best of the bunch, so stay tuned. That one has a couple of uses, although it like the others does add some extra fiddling.
HJ