You know, after reading all the comments, I believe it has to be a regional thing, or store by store, with Joanns, Michaels, and many other big box stores.
There is a new Joann Superstore that opened near me. The management and all the clerks couldn't be nicer or more helpful. I have had them ask if I had a coupon, and when I said no, pick up one from under the counter and scan it for my item.
Sorry for everyone's bad experiences, but I do believe it depends on the individual stores as to how you are treated.
Bugga in OK
"Be kind whenever possible. It is always possible." Dalai Lama