I tear them out also.
I buy cambridge classic t-shirts at Mervyns though, and they don't have them. Thicker, softer cotton than hanes or fruit of the loom.
But I feel ya bro. Do what I do and take a very small pair of scissors (I use the ones in my swiss army knife) and cut the tag out, as close as you can get to the stitching. Works great. If you tear them out... well... you know what happens.