I had to look this up... I only ever remembered the one where guilds Zoned into a raid a week before it was released using the LFR group and manually zoning in.. Think that was MSV?
From the sounds of it this is not quite the same thing. That DS bug required you to zone out and back in to be able to loot, a specific action required to produced the exploited results.
I honestly would be very disappointed in Blizz if I heard they were mass banning people because they queued for LFR more than once in a week...