Silly me, here I thought that riding single file was pacelining without the intent of drafting.

I also don't plan on driving donuts on icy roads, but I took a class to learn what to do just in case I found myself in an unplanned whirl.

I have definitely had creepy guys follow me on a bicycle. Multiple times, I've also been followed dangerously by cars, including one for 100 miles down I-5 back before there were towns and highway patrol cars at frequent intervals. I've had way too many encounters with guys that don't know how to respect personal space to let anyone follow without some kind of evaluation.