As far as I know, It is counted as IP and not a currency. Therefore collecting any "debt" would be bordering harrasment.

What if you are in a Debt Management Plan or IVA for example and cant afford any payments apart from what you are legally bound to pay, I dont think there would be any way to enforce collecting a bitcoin loan in the eyes of the law.

Thats not to say that when it does become a counted currency, which hopefully it will that you wouldnt be able to chase it. But I dont think anyone is even obliged to pay it once you have loaned it out.