"it might be cause there wasn’t enough thread to hold as they probably tried to save space in the cylinder for more air"
The above was taken from one of your replies in the original thread and to me if that is the case then that is bad workmanship that caused the failure, and as stated by Pete you will always get people who take no pride in their work.
I'd take a guess that there are more failures that cause injury or death from people modifying cars/bikes etc than from airguns, should we ban those??
If you're not comfortable with being around air cylinders then only shoot springer and stay at home away from anyone with a pcp.