Thats toe wear not camber wear. As others have mentioned set to 0 and enjoy more tire life
Also when you go get an alignment... dont just drop it off and say "align it". You must specify what you want or they'll set it to BMW acceptable ranges which kill tires. For example you could say that you want 0 toe front and rear, 6 degrees of caster and -1.5 degrees of camber front and rear if your just drive on the streets. If you drive your car more aggressively, you could go up to 1/16" or 1/8" total toe IN in the rear to help settle the rear end during more aggressive cornering and add some negative camber so you don't murder the outsides of your tires.