It’s also definitely not a good move for novices. I’ve done all kinds of knife maintenance over the years and I recently snapped a lock bar. 
I’m a big fan of the Tangram Santa Fe. I like the Amarillo. So I decided to try the Orion. The one I got had a “wet noodle” detent. It was bad enough that after sharing a video with their customer service, they just refunded me the cost of the knife.
Well, I didn’t want to throw it away. So I decided to try putting some more tension in the lock bar. Whatever steel they use does not want to inelastically deform. It was flexing to a point that seemed extreme but according to my calipers, I wasn’t getting anywhere. Since I was already refunded, I decided to push past what I would normally consider safe. It didn’t just snap. It was like the steel shattered along a stress line, leaving sharp edges which sprung back hard with a reverberating “pang”. Had I not been using pliers and a vice, it could have cut me.