I'm sorry about your store situation. I've been in 10 times over the years, and absolutely love it. I've bought things each time, most recently those old-photo greeting cards with the hilarious saying on them. I've taken people there, and when I read about it two weeks ago I was horrified. 
I understand that anger. Not the depth of it you have (I have been ripped off at my house twice, once by a meth-user kid I had known for 20 years--this is no lie). I was out only $2000+ in that case. 
It's easy to say "Take your anger and put it towards a solution" when you're not feeling the sucker-punch of getting violated. You have witnessed "dozens of friends" as you say -- seen the needle and the damage done. Yep.
But...some of those people have actually made it. And all are as human as you and me https://goo.gl/Y54vni and they don't need or deserve the fate you suggested. 
Suboxone works--look it up. *Good* rehab works. You can't throw away people. That's the bottom line. There are ways.