KASH? I know Kash!

Why would she do something like that?

Like Mike I don't know the first thing about DA lol but I can offer you some advice about dealing with people like these due to my previous experience with them.

This person is trying to provoke you, or is at least getting some sort of sick joy out of making you sad. The best thing to do, if you can't block them, is ignore them completely. Delete all their comments (DON'T read them; they will just make you sad), don't reply to anything they send you, and basically act like they're not there. After a while, when they see they are having no effect on you, they'll leave.
Or if things get out of control... as bad as this sounds... give 'em an eye for an eye.

This worked for me when I had a spammer on my site who wouldn't leave me alone. I used to read her hurtful comments and start crying, but pretty soon I learned that I had to be tough when dealing with people like this and not let what they say get to me. So I challenged her to a cuss war on my site and... well, I haven't heard from her since.

So if possible, find out this person's IP so you can give them a scare. XD