I drop my flag sometimes, but i pick it up. When i was young and filled with rage and anger i would wipe my bloody knuckles with my flag, and put it back into my wallet. I use to carry around multiple flags just so i could hand them out to fellow Americans i dubbed as worthy.
How many times during the civil war alone...do you think flags were burned, shot, cut, drenched in blood & mud? You know why it doesn't matter? BECAUSE THERE WAS A AMERICAN STILL THERE TO PICK IT BACK UP!! Same reason this little act shouldn't upset you.
Honestly its my flag, ill do with it as i dang well please. Remember this is America, you have the right to say whatever you want, and i have the right to punch you in the teeth if i don't like it.