Oh god, so horrible. It's people like that make it stupidly hard to just talk to women on dating sites, I swear.
I did have a creepy girl once myself. We messaged a few times, she seemed nice enough, but she'd often message very early morning when I wasn't even awake and then get angry when I didn't reply right away. One day she was getting a bit pestering while I was at work, and then she sent a sound clip.. It was her masturbating, which was really not appropriate, so I had to tell her I wasn't interested and to please stop being a pest. She took that as a cue to find all my family members on Facebook, including my sister and mother, and message them about how I wouldn't leave her alone and that I was such a sex pest and she hoped they were proud. Fun conversations.