Black ops classes vs. newb tubers?

well to be honest i normally would just equip scavenger for a blow you up class... that way you'll never run out of grenades and rpg... but i rarely even use any kind of noob tubes... the best way to fight like that is just piss them off with regular fire power... unless your on nuketown... then its different but if you fight fire with fire your just gonna get burned if you catch my drift