Using only Ice in a bong.

[$n0w]

id say your coughing and the flicking of the lighter is gonna wake up someone b4 the bubbling would

 

[PrettyColors]

Just don't take a rip you don't think you can handle and you should be alright.
You may being a little over paranoid with the bubbling sound.

 

[Olyn]

The Ice will probably melt before you're done with the bowl anyway.

 

[sixnineissofine]

A tab bit more harsh, but you'll be able to taste the buds more than with water, which purifies it.