Had they been a Swedish company operating in Sweden, you could have suied them...

We have a pretty good law taking care of that. This law is governs the use of literature, software, music, movies, photos, architecture and other art.
Software, database schemas and other structures that can be made to hold large ammounts of data is considered works of art in Sweden. (Look Ma, I'm an artist! :)

This law states that (this is my own crappy translation) that:
A work of art may not be changed in such a way that it violates the creators reputation or distinctive character as an artist; neither may the work of art be made available to the public in a shape or context that is insulting to the creator.

So, you could have said "No way!".

Here is a link to the full text (in Swedish).

/brother t0mas