Is it normal for someone to get your cell phone number without asking you?

I used to do this when I was a kid. It never occurred to me that my behaviour was inappropriate and that I could have been making people uncomfortable. I was crossing boundaries. I assume that he got it from someone that has your number. Are there student directories at your school? At the school that a former friend went to, each student was given a student directory with every single student's phone number. I always felt like it was a bad idea.

Maybe he's a combination of shy/very involved in today's technologically centered world?
What, with the social medias and chat sites nowadays, the concept of privacy doesn't occur to some people in the same way as it did to previous generations.
Given my own personal experiences, I would probably feel creeped out by this sort of behaviour, but many people may find it normal.

Unfortunately, this is normal. I used to have a cellphone that people seemed to find out the number of without me giving it to them. Even after I showed I was annoyed with them they acted like they did nothing wrong. People these days are inconsiderate and seem to lack the ability to notice when they're being inconsiderate.

Oh for goodness sake, ask him, not us, we don't know where he got your number or why!

I'm amazed how many questions are asked on here by people who don't have the basic common sense to ask the person concerned rather than complete strangers. I'm not talking about questions of opinion, but questions of fact - pointless exercise!