Can a girl use twitter at 14 years old? Is it dangerous?

[DeathR]

No not at all. Though you want to be on the safe side and not give out to much personal information to people you do not know in person and even then you might want to limit it since you are on the internet and faking being someone else can be very easy. But as a driect threat no it is not dangerous to you at all as long as you are smart about it. Also facebook allows an option where a person can not see anything unless they are your friend at 14 i would say go with that option and only add them if you know them.