FACEBOOK PAGE - URGENT!?

[Iamunknown]

I own an edits page on Facebook. All of my work is my own and has my page link or 'sample' written across it.
A girl is threatening me saying she can get a water mark remover app or something, and remove the link so that it's her own.
I don't know if this is true or not but I need to know this..
Can I ban her from my pages even though she hasn't liked them?
If so, how?
This is really urgent as I spent a lot of time on these and I don't want her stealing them.
If it's a difficult process, please put it in simple steps.

Thank-you so much in advance.

[Ian Morgan]

she could, hand yours in first, also dont put your stuff online. silly.
i doubt she is gonna though if so you can use the origin of the document to prove it.

[Jake]

I found this youtube video. Check it out: http://www.youtube.com/watch?v=sHEE2BLBd68

[Sarah]

if you have proof you did it first then if she does you can take her to court over it, also it is theft and illegal so report it to Facebook and even the police if you want and that should stop her doing it.

[abraXus]

watermark apps do exist, but they arent perfect... she is just threatening you because you are probably threatening her