So this is an interesting discussion, I don't think my blinking light is blinding during the day, but I never considered it might be. At night on the MUP I generally angle the headlight to the side when someone is coming from the other direction because I know it is bright (even though it is pointed down towards the road maybe 10 feet ahead). I'll need to think about doing that with the strobe too.
The MUP I ride is about 9 miles long, and it has 26 road crossings. So I use the strobe during the day to be a bit more visible at these streets. There are also many families walking with little kids, and I like it when they see me coming from a distance because it gives them more time to get the kids under control (rather than running left and right across the path).
Mark