Advice on how to handle mouthy players

[ballgame99]

Did a freshman game last night with a bunch of whiners. Mostly just "oh my GOD!" and "he's hacking me!!" type comments. Nothing that would, in my opinion, warrent a T on its own, although I did hear one "that's bullcrap!" I thought about Ting that one up, but stopped myself. I'm a fairly new ref so I would like to hear what an appropriate way to nip this stuff in the bud. Because once they started whining they didn't stop.

The one team even started making little jab comments during free throws.

Thanks.