They are claiming that when they signed the release form, they were unaware that they were going to be represented in such a bad light..
"They claim film-makers lied to them about the true nature of the project, which they believed would be a documentary about their hardship, rather than a comedy mocking their poverty and isolation."
Producers of 'Borat' used ambiguous terms such as "documentary style" or "film involving you and your customs"
This seems more like wrong-doing on the part of the producers rather than Sacha Cohen..