I will teach a cashier how to give a gift receipt at the register if I notice as I walk by that they're sending guests to guest services for stuff like fix a mistake or gift receipt. Some get snappy and say "well you're not a GSTL, so I don't have to listen to you." I then promptly say I was just giving advice, and then go tell the GSTL who usually goes over there and tells them a little less optionally how to do it. We've started having less and less guests needlessly sent to GS.