I was cranky leaving the house today. The road 3 blocks from my home is still torn up, requiring some acrobatic manouevering to get over. When I got to 14th St., I dismounted and walked my bike across as usual. Two bikers were riding on the sidewalk going the direction I wanted to go, and they both gave me the "look" as they rode by. The "look" + scofflaw = chasing [by me]. By the time I got back on my bike, a third guy popped up, but he only had 3 m on me and was easy to catch. I must have been in a seriously pissy mood, since I caught up with the first two riders and passed them in <2 blocks. I stopped at the 4-way stop sign [as usual] and scofflaw #1 catches me, then when we get to the next stop sign and he blows through it into traffic, doing an aggressive merge. Scofflaw #2 is a little smarter and pauses at the stop sign but basically does the same thing. I waited for a gap to show up, then took off down the hill after them. I caught #2 as she was weaving around another cyclist, then made the light at the bottom of the hill, getting back to within 20m of #1. However, it was at this point that I had to give up the chase and make my turn to continue on with my trip to work.