The topic of lock systems comes up a lot. I had a cheap old Master combination lock on the bag that I use to hold my gym stuff. I have long since forgotten the combination so I thought I'd just cut it off.

First I tried my hack saw on the hasp. The hardened hasp laughed at my hack saw.
Then I beat on the body of the lock with my hammer. I seriously mis-shaped the body but the lock still wouldn't open.
I tried cutting the body of the lock with my hack saw. That worked, but it still wouldn't open.
I used a pry bar in the saw cut kerf to pry the body of the lock apart. I could clearly see the insides, but it still wouldn't open.
Finally I used my channel lock pliers to pull the innards out one at a time. Success.

I don't have a big bolt cutter or an angle grinder and I thought my Dremel would take too long. I'm laughing at movies, like Rocky, where he hits the padlock with a fire extinguisher and it pops right open.

I guess that it's good that I'm honest because I'd suck at being a thief.