My daughter's friends and going places?

My daughter is 17 and a senior. She never introduce me to her friends. She got plenty. She talks to her friends all the time but when I ask her why she never let me meet them she brushes it off.
Now that school is out she want to go places and do things with her friends. I don't know her friends. There have been several missing persons in my area the past year. A 22 year old man in my town who got two small kids was going to meet some friends in his car. He's been missing since December it's now almost July. A guy went missing in 2016 his remains were dug up last month in someones back yard all in my town. I just can't let my daughter go places with people I do not know. She does not understand this. I live in a bad area that's drug and crime infested. She won't even introduce me to her friends. Am I being unreasonable‽
My daughter's friends and going places?
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