It's not a technical limitation on a certain type of packets, but about the results.
The problem is only when the end result is that you are deliberately stopping other people from making valid use of the spectrum.
There are valid cases for doing what they are doing (preventing spoofing).. this just wasn't one of those valid use cases.
So is it a disruption feature if in effect it neutralises disruption when used correctly? As I said, it is a grey area.
> "Containment can have legal implications when launched against neighboring networks. Ensure that the rogue device is within your network and poses a security risk before you launch the containment."
The wording in the FCC Consent Decree in this case suggests that this feature would actually have been okay if it was being used against actively hostile networks:
> "Specifically, such employees had used this capability to prevent users from connecting to the Internet via their own personal Wi-Fi networks when these users did not pose a threat to the security of the Gaylord Opryland network or its guests."