actually if u want to get technical, caster is the worst wear for tires lol. toe will make them feather and things like that, however, if you have negative or positive camber the whole tire isnt making contact on the road with the same amount of force from one side of the tire to the other (width wise). this will make the inside or outside wear out, whichever is taking the most weight. toe adjustments determine if the vehicle will go straight down the road, however if u have 3 tires pointing straight, and another with toe in or out, u get a vibration which then wears on the tire. i can see y u would think toe is the worst, but honestly without all three together set right, you will never get the most life out of your tires. i am an alignment and suspension tech and when doing alignments i try to get the actual measurements as close to spec as i possibly can without throwing wrenches lol. im not saying i know everything there is to know about what can cause what, but im still not toooooo bad at what i do. o, btw, dont f**k wit caster on ur civic unless ur a die hard road course racer and things like that. for everyday driving, camber and toe are abotu all u need to worry about. honestly i havent had any problems with tire wear bc i dont keep tires more then 10k miles anyways and i do an alignment twice a month on my own car at work so w00000000000t