A lot of good ideas! 
I personally like the Chairman’s “How else will I feed the hostages?” the best. But Lars’ “Tsk tsk… Too much minding other people’s business…” is the most appropriate, IMO. And while I’d love to go into a rant like Rufus’ suggestion, I probably couldn’t pull it off. Maybe if I just screamed as the top of my lungs…
“F@&$ YOU!”
Or I could have started pelting the guy with cans. “How many cans is too many?! Is this too many?! Is this?!” What was the topic of this thread again? 
Anyhoo…