They are not too mutch into this, real danger is when u have stuff in ur car,and before u exit safely the shop. Those are the times when u can get busted.
There is bigger business than carding, like skimming. There they care mutch because the amount of money is way bigger than few charges in some shops.
But danger is real, don't carry to mutch items in your car same time, don't card where people may know u and don't come back after a big hit. Try to have matchig plastic if u're in USA and good luck.