A month of so ago I was passed in same lane by a motorcyclist doing a wheelie for a good 200yrds. A week later I was driving under a railroad underpass and motorcyclist was doing similar wheelie.
Last week leaving dinner a motorcyclist was very agressively weaving thru 40mph traffic at ~60mph, cutting folks off with inches to spare (including me), then ran a very cold red light making left turn intentionally swerving between two oncoming vehicles.

There are of course lots of responsible motorcyclists too.