I wouldn't say catastrophic, but reports of junk in the carbs, engine, bubbling of the paint, etc. Someone even said the F/G tanks are just not safe, and are not DOT approved any more, because they can break apart in an accident and then you know what happens. I'm not sure a cheap metal tank wouldn't rupture too with the right crash.
Riding a M/C is hazardous to your health. But then so is eating broccoli.
Dave
69S