Implementing a 'kill switch', ethically dubious question!

[eluser]tolyx[/eluser]
Hi all,

Sorry to have to ask this, but I'm in the middle of a small project for which I suspect I might not be paid. As such I want to implement a kill switch which will effectively disable the website, without having access to the FTP or database on which it will be hosted.

So in the case that he doesn't pay, can you think of an appropriate way that the site can be disabled such that the user will not be able to bring the site back online without some very specific technical knowledge of the underlying code?

Thanks!