We understand that sometimes you may want to have someone else logging into your game to help you with an event etc. However, other users should not ever access your data as this is a breach of Facebook's privacy policy as well as the fact that Facebook has access to a lot of your sensitive information, including your contacts, private messages and a whole lot more! It can also can comprise your data and we have no responsibility for any changes they may make, e.g selling butterflies, sending gifts to others, and laying eggs.