The buffer safe zone for most Hondas are 1.5-2.0" where you do not need a camber kit. ONe thing that will affect wear too is toe. Too much drop and if I remember right your car will toe in, that will cause tire wear just as bad as bad camber.

I've been dropped 2" for over a year and my tires have worn nicely. But I also autocross on them frequently scrubbing the outsides too.