Being a journalist is a legitimate attendee. Especially since so many prominent politicians are attending this conference.

No, he's actually not. If you read the poster's story you will see that Flock directly informed him, it's a customer-only event, and no media was invited. Therefore, whatever legit press credentials he had, did not make him a customer, nor entitled to be registered there. He may have registered under false pretenses. Surely he was informed, as part of the registration process, who was eligible to attend in the first place?

Flock, as the event organizers, had every right to revoke his registration, because he was not qualified, and what's truly remarkable is the volume of respondents who are shocked and outraged that Flock was granted control of the hotel rooms in a block which were dedicated and promised to their conference attendees. For crying out loud.