Generally, most businesses in Aurora don't really care if you OC. I've had a few problems but not that many considering how often I do it. Usually the problems I have had were the result of some anti getting upset and not because the business actually banned OC. Also, I tend to have more problems in certain parts of town like Old Aurora than Aurora in general.
In regards to Blockbuster, I have never had problems there either, but I cant say the same for Target (though it was only with the one Target near the Aurora Mall).