Just symptoms of the 'coming out' of spring -- stupid drivers, stupid MUP-walkers, etc.; it's part of the season.
Sweat? Hell, I sweat riding to work in 33F! I NEVER get off the bike dry! Extra clothes? Come on, you want some cheeze with that whine?
Have yet to see a hipster... period. Ever. In life. Immigrant commuters salmoning, sure; minority teens on BMX's salmoning and/or ninja-riding? Absolutely! But they're so slow, my non-jogging self could outpace them, they're no problem.
Personally enjoy the oblivious MUPpers; when my normal signals don't rouse them, I get about four feet behind them and give them the drill-sgt. voice; they move then! Have yet to have to do that to the same person twice.