I was super pissed about that. The interference, not the call.
But, my lurker, 30 year casual fan "football IQ" is pretty low. Is it sometimes (ever?) a good tactic to bust up a touchdown pass play and take the penalty to live to fight for one more down?
Don't know. Asking for a friend.
In certain situations it's a very wise play, and it probably was intentional in this case. The DB had no clue where the ball was and may have decided the penalty was better than giving up 6.