several related peeves
Folks who ride those double-wide adult tricycles or pedicabs that take up an entire lane... fortunately they generally stick to the less traveled streets and stay off the major thoroughfares.
Towns (like mine) that paint bike lanes on the busiest streets - - why can't they put them a block or two over on the side streets? I'm in a very urban environment with lots of on-street parking, and between the parking lanes and the bike lanes, there's almost no room left for driving.