I preface this suggestion/idea with the disclaimer that I am not a lawyer.
Having said that, the idea is to (optionally) enable a feature that functions as some type of legal disclaimer or terms of service that the worker/evaluator/manager would agree to when signing on for a given task. After all, we may be talking about money transmission (even if through a decentralized medium) as well as a decision making process as to whether the work meet the assigned criteria with their task deliverable. There seems like a lot of shades of grey here, and it might be good to bake in some legal protections that people could tailor relative to their given environment. After all, there is only a limited amount of legal precedent in this domain. I can think of a few ways to implement something like this in Colony, but would like to hear any initial reaction/concerns before delving deeper. Cheers!