Sorry. I don't see your logic.
This is not something that "happened" to someone. This is something that they saw. There is no evidence that they even ever ate at the food court.
Yes, it is disgusting, and as a well known germaphobe, I'm pretty appalled. But having their room comped for the entire stay is completely ridiculous.
If they found out that they were sleeping underneath a nest of dead rats in their room, I would totally understand. If they were attacked by a swarm of bees in a hive hanging in their closet, free room!! If they found out that their toilet was the secret gateway to Hell, and it sucked down their first born - by all means - hire an exorcist and comp their room.
But someone strolls by a food court and sees reprehensible behavior and apparently complains loud enough to get the news involved - and their room is totally comped? Not cool. This is what causes rates to go up for the rest of us, and this is what causes everyone to complain about every single little thing - because THEY WANT FREE THINGS!