By "swarming" are we referring to a tactic similar to what the guerrillas used against the US COP in Wanat? That is fine if you're a third-world guerrilla. American forces have a much pickier public back home that gets upset if anyone dies.

For us, why bother swarming? I'm reminded of a book that I read before joining the Army. While it's focus is on Special Operations forces, the lessons in it are equally applicable to any force the is outnumbered or facing a well-prepared enemy. Swarming seems like a less efficient use of resources, that is more difficult to C2, with negligible, if any, benefits.