I guess I just take a more draconian approach to protecting my games … you f**k something up, first I beat the sh*t out of you, and then I take your money to replace what you f**ked up. LOL.
I would do that too, so the sleeves help lower the aggro for everyone :) I even buy sleeves for my hero cards.
I run Descent with my local group as well as at Cons and with a local High School club. The sleeves given me peace of mind.