Since I've had my On One fatty I've nearly been knocked off 3 times and nearly witnessed a smash because of the bike.
I get a lot of people paying more attention to my fat tyres than the road ahead. Some of my local loop means I ride on a main road either to or back from the trail. I've had people coming alongside me looking at the bike and then drifting towards me. I have even had people coming out of junctions, looking at the bike and nearly pulling out on oncoming cars.
But given all that it's one of the best fun bikes I've had!