Sounds like a rant to me...
Agree with BreatheGood.
I can see where you're coming from, when you just want to take it easy all the bustle can be aggrivating.
But on the other hand, I do also know that I will frequently ride hard while commuting (not always though). For me it's just a matter of keeping it interesting- seeing if I can knock a minute or two off here and there.
Could also be that the other persons piloting skills are superior than yours (not knocking you, just saying) and what seems like a close call to you is no biggie to them. Maybe they're racers or fast club riders that do the whole pace line thing regularly so close quarters manuevering is the norm.
Maybe their just expletives.