On the other hand, there are some bike lanes that are so poorly designed or laid-out that I have to take the lane. One such example is on 2nd Avenue in Downtown Seattle, which has tons of ramps for driveways and pedestrian mixing zones, an uneven application of asphalt, and too much oncoming traffic (as it's a two-way bike lane). If I'm going southbound and downhill, I can generally keep up with rush hour traffic anyway.
Also, sharrows are pretty useless when it comes to being safe infra. It gives false confidence.