Should I give my online friend my cellphone number?

What's so different from giving her your number compared to someone you know in real life? It shouldn't really matter. A TON of my online friends had my phone number and we talked a lot. It's not a big step. Just as long as they're not crazy, it should be fine.

Even if they are, I've dealt with stalkers via cell phone. It's called blocking them. Someone called me at 3am all the time and left blank voicemails recently. Even text me a few times saying some bull trying to get me and my bf riled up. I dubbed them a troll and figured it was some kid I wasn't too fond of online who got a hold of my cell number and was trying to get my attention. They also made a fake FB page of me that I reported and was removed by FB. But it didn't bother me. I have been stalker free for almost a month now. :)

But it's not like they can get your personal information through a cell phone unless they know cops or something, right?