Most people seem to think that C4 is cheap and they may have a point but its not a scratch on the cheapness of BBs or Claymores.
At least C4 has to be manually aimed, thrown and detonated at the target. It also has a habit of killing the user sometimes and if the guys got Flak Jacket then your screwed plus it has a tendency to glitch and do zero damage to a guy right next to it.
Its a far cry from the cheapness of placing something on the floor and hoping someone runs over it. Extra cheapness points for teaming it with a shock charge or placing it on a stair case. When I play FFA 50% of the time I will spawn on a BB.
I use C4 because its the only effective lethal for my run n gun shotgun classes not because I think its OP.
I use engineer and blackhats.... you can use prone to bypass betties, and use blackhat on claymores.... or heck just hack either or the two. But c4? It is mainly used as a improvised grenade hence why he called you out on it.
GT: Boomer and Tank Pretty darn confident..... I don't want to have to wait till the Microendony XBOXS 4ii comes out another 15 years later....