Hmmm..What would I do?
If you do not load shotshells anymore, and do not know of anyone to give the components to....Just cut them open at the top of the crimp, dump shot into a container, pull wad with needle nose pliers, dump powder in a container.
Trim where you cut top of shell and put the empty hull into a shotgun and shoot the primers.
Then sprinkle all the powder in the flower garden or just out on the grass ( It will help it grow )
Toss the wads and spent hulls, keep the shot to use in some other way or give away.
Thats what I would do if I had NO USE for the bad shells.
Now the FUN way....!!!
Take the powder and make a trail of powder in the dirt away from anything and light it at night..!!!
It won't poof in your face unless it Black Powder. Smokeless powder just fizzles and burns.