<human>: About 7 months ago I got a weird voicemail from a former college classmate of mine, just telling me to call her back. A little over 3 months ago I started receiving facebook messages from her. This girl was in one of my classes in 2006, and I interacted with her maybe 2 or 3 times, in reference to homework or something. Nothing significant at all. The messages she sent me on facebook were mostly one sentence, just about music she liked or asking me why I wasn't responding. After being annoyed with all the messages I just decided to block her, and thought nothing of it. Then within a day I started receiving messages from her on my Youtube account, which I also ignored. Eventually she went away. Now again, a few days ago, she sent me around 20 more messages on Youtube, and somehow found my email address. Messages just started pouring in. In this round, the Youtube messages were all weird Christian shit. Bible verses, Christian cultists speaking, etc.

Here's the fucked up part. She started messaging people I know. My friends, my sister, and my girlfriend, and recalling intimate details about our lives; tattoos some of my friends have, relationships, people's backgrounds, places people have lived. She sent them anywhere between 10-30 messages each. I asked most of my friends to block her if they hadn't already. No one knows her at all, and some even thought she was a sort of spam bot. No one has replied to her to my knowledge, but I don't know how many of my friends/acquaintances she has contacted.

Though none of the messages are threatening, it's getting to be a bit scary. I'm not sure what I should do. I'm concerned she will begin to contact people I work with in the professional world, or potentially do some damage. Please, any advice would be great.

Summarize the given text in a few sentences.
<bot>: Girl is sending me and my friends a ton of messages on the internet. I had one class with her in 2006, minimal interactions, and no one else knows her.