See I think the gun training is actually creepy and proper harassment. However I do see as Jack being like these Captain's of old, who harassed and bullied their troops relentlessly. He does have an appalling way of relating to his staff, that in real life would lead to a tribunal pretty quickly.

I'm glad they did pair Jack with Ianto though, as I think if he carried on that way with enough characters he would have worn thin very quickly, and just been this creepy lothario type.