She also said she has my ip puah!!
If you are concerned about her having your IP address and possibly retaliating by sending you a worm or something, most IP addresses can be re-set by unplugging the modem for 15-30 seconds or more. I seriously doubt anyone would be this crazy but who knows - her business is probably very profitable to her.
If you google any designer handbag name, two dozen sites come up that supposedly sell it. Of course they all sell fakes. Worse, I suspect some are phisher sites for credit card information. Sites that supposedly sell electronics are the worst for this.
That said, I don't do anything about it. It's futile and caveat emptor with everything. If people think they can buy expensive Fendi and Balenciaga purses for $300 each (and order how many rare models they want, yet), let them, that's their problem.
Re the IP, so she has your IP, so what? It won't lead her to you. At best she can only find out the town you're posting from (assuming you're not posting from a place whose name shows up, like a college) and she'd have to subpoena your ISP for your contact info. Or visit the college to find out who was logged into that library computer at that time, LOL.