The sheer amount of bags the airport baggage handlers have destroyed on me is astonishing. It's bag enough you bag is trashed but now you got to figure out how to get home. One essential I pack always is DUCT TAPE it's bailed out me and my friends quite a few times. It fixes zippers and rips quick. I've had a few bags trashed, next one I buy is armor sides, but I also live in NY where the airports are brutal.
I'm not saying shit doesn't or won't get trashed I'm just saying that I havn't had an issue yet (knock on wood). I just toss tons and tons of clothes in.