I suppose it depends on what you are doing. If you are being too dangerrous with clamps or weights, I’d think there is a very real danger (as opposed to ‘just’ jelqing - it can be dangerous too).
The important thing to remember is that when you are PEing, the gains WILL NOT come overnight. Tomorrow you will not wake up and have your 6 incher turned into an 8 inch log. I think that’s where the most injuries come from: overzealous/reckless exercise. At least, it was in my experience.
Be patient and don’t needless risk (PE is kind of a calculated risk I think) because let’s face it, we’d all rather have a small functioning penis than a large impotent one.
Cum vinum intrat, exit sapientia