Ok i found out why it is Bad to have ice in a bong.

-The water vapor attaches with all the smoke and tar and whatnot, therefore making it thicker/stickier so the TAR sits more in the lungs and may become trapped.

-Accualy smoking a bong is not the greatest because of this, but is still ok

-Ice is a lil different because it is frozen and some molecule shit happens, so when hot smoke lifts that vapor stuff off it does some shit thats not good,

-Water makes Bad stuff stay in lungs because it binds with bad shit

Hope ya'll fellowed that