I love people who think freezing their jeans will make the bacteria go away. Did you read that on a denim blog? Thawing them out and wearing them the smell will return immediately.
Also washing them won't prevent crotch blowouts, if you let your jeans sag and wear them too tight the friction and tension is primarily what causes the blowouts.
If you want to keep going and not washing try febreeze... or soak them.