Yes, multiple times. I have some good stories actually.
So I like to bike basically everywhere in my city, and I get creepy people following me a lot. The most memorable time was when 2 guys who were maybe ages 20-25 started following me around in their car. I am assuming they thought I was around 18 (I commonly get assumed I'm this old). They followed me in their car with the windows down for a few blocks before I started to do circles in the neighborhood and they were still following me. I then started to bike down to a busy area in my city that was nearby to see if that would scare them off. I had to stop to cross the street and they stopped right next to me. They asked me the typical stuff, where was I going, how old am I, do I want to go with them, etc. while also saying a bunch of rather vulgar things to me. I ignored them and they stopped following me when I finally was able to cross the street. Definitely scary. This is only one of many times things like this have happened.