I think the difference is that RWS is owned by the county and therefore subject to their smoking policy. And I'm not sure you'll find any NFL stadium that allows smoking on premises now. Not sure if it's an NFL rule, or guideline, or recommendation, or what.
Now you have to remove all metal objects - keys, phones, etc. They'd just add this to the list.
An interesting list of the smoking policies of all NFL teams as of last summer: http://www.no-smoke.org/pdf/smokingpoliciesNFLstadiums.pdf