If you have to ask if it is restricted....you didn't have authorization. A simple SFOC is not sufficient in this area.
If you don't like people telling you your flights are illegal, then don't do illegal flights. I don't mean to be the one to play bad cop, but you need to do your flights properly. This is not a toy, and you are using it to promote a business. They are cool shots, but you can't get those by breaking the law. It can be a hefty fine to fly without proper approval, and if you did interfere with helicopter flights by accident, it could be criminal charges.
Maybe you are aware of this, and great, so consider this info for others who come by and do the drone tourist thing.