Nope. Nothing but love for fellow cyclist but I think this is a bit too sensitive. Taking note of how close they are to you is ok, but take note of how close these drivers are to the center line. Some even cross over a bit. To me that is a courteous driver. We can't expect them to drive behind us at 15-25mph or whatever your fitness allows.

I'd say acceptable, though I do agree with you that speed was a little fast on some. I remember the days before I was a cyclist though, and it isn't always bad intent. I used to speed by to pass so that I spent little time sharing the lane an favor of getting in front quicker.