I'm going to give coupons to an autistic busker
Ok, Why are you giving the busker coupons?
I feel sorry for him. The fucking world is treating him like shit because he's an autistic.
It's wonderful that you feel sympathy towards the busker, as it's unfortunate that other's don't treat them well due to a mental disability. If the coupons will help him and make his life a bit easier then I support your choice to give to him what you can.
I think I am going to give a coupon that says sorry for staring.
Giving them a coupon that says sorry for staring seems kind of rude. You are better off just leaving a tip or something like that if they are busking.