Have you ever received a creepy pm, text message, or email? What was the creepiest one you received? DETAILS! 
I think this one qualifies.
I kept getting texts calling me Sally (not at all my name) and saying the dude missed me. I kept saying wrong number. Dude kept texting for days and I was like whatever. But then my daughter (then 10 I believe) told me SHE was getting texts from some guy calling her Sally and “acting like I’m his girlfriend or something”. He wasn’t saying anything at all sexual or anything but still. Finally at some point he said that it wasn’t really Tom (the name he had said) and that he was sorry and would leave me alone, and he did.
But WTF? Until he texted my daughter I thought it was just some random loser, but I have NO IDEA who could have had both our numbers. She had just gotten her phone and was on my mom’s plan, not even mine. The only people who had both our numbers, to my knowledge, were a few very close family members and there is a 0% chance of them doing something like that. I have all kinds of weird ass people in my sordid past but not one of them had my daughter’s brand new phone number.
I am willing to wage that damn near every woman on an internet message board, this one included, gets at least one creepy message any time she even mentions enjoying sex.
Sent!
Anyone else just PM’ed Modern Master?
Nope I save it for women who say they enjoy sex.
I used to get a lot of random IM’s on AOL. Most were silly, but one guy made threats. I would save the best ones on a Livejournal account.
We’ve struck gold here.
I’m drinking Starbucks while reading those. Some of them are very funny. 
On deviantart, Someone randomly told me that they wanted to sniff my panties…
With my old phone, about two years after I brought it, I kept getting multiple people ringing up, telling me that I stole someone’s phone.
You may enjoy the subreddit r/creepyPMs, they post some great ones.
Your technique needs some improvement in two key areas. For one, I’m not a woman and two, you didn’t even send me a picture of your junk.
How are you supposed to seduce women over the internet if you don’t show them what they’re missing?
Get your head in the game, heh. 
Nope, I don’t want Pitted!
Or this, sadly old and not updating anymore, blog - http://whywomenhatemen.blogspot.co.uk/
My first pitting. I feel all grown up,
I guess I should have saved all of the creepy PMs and such I’ve gotten over the years. Maybe I’ll start now, but I get less now, since I participate in those kinds of forums much less.