Final answer:
The use of a remailer keeps communications anonymous and the responsibility for what is communicated and whether it is ethical or legal lies with the user of the remailer.
Step-by-step explanation:
The use of a remailer keeps communications anonymous; what is communicated, and whether it is ethical or legal, is up to the user of the remailer. When using a remailer, the user has control over the content of the communication and its ethical and legal implications. The remailer itself is just a tool that facilitates anonymous communication, but it does not determine the content or the ethical and legal aspects.