Should my folks be this concerned for my safety on the Internet?

I understand how passing someone on the web details such as your address or phone number is dangerous, and that’s why I wouldn’t do it. I understand laws of Internet use that apply common sense, such as pornography.
However, my parents generally think about my use of the Internet with more weight than those of many of my peers, in and out of school, according to them. I have no rights to social networking sites and my computer was even previously monitored by the WebWatchers service (which they no longer use). They are often concerned about my posting of very basic information, such as the city and not the specific location where I live in, or even my age. You can probably find a handful of other 15-year-olds living in Fairhope, AL, but it isn’t like a crazed man will hunt me down now that I’ve mentioned those two facts about myself by shotgunning every resident in town until said loon finds me.
They don’t even appreciate my being on Fluther itself.
I know the Internet is a dangerous place, and I’ve been almost perfectly strict about the rules they set for me when I was younger, but, really, my age? I remember an MMO targeted for children under 10 which encouraged exchanging of that sort of information.
I can live without Facebook, but only because I’m not social and wouldn’t use the site anyway. Even if I did want an account through a social networking site, I can’t imagine even letting myself get away with posting a phone number without crying to mom & pop.
I do believe part of the added concern from the two is that my mother is a pediatrician, or, so to speak, she sees every child in the area on a weekly basis and always has 15 minutes to talk with other moms about parenting. She’s probably heard (or even seen) countless horrors about how the Internet has torn this kid’s life apart or how that kid learned how to grow pot from this and that, etc.
I would like to know what the community thinks about this regardless of the fact that I’d probably never even show my parents because (a) they don’t approve of Fluther and (b) they don’t (or won’t) approve of what I’ve already posted.