If taking the entire channel for the first time with hundreds of patches, you will see many prompts.
To bypass license agreements --agree-to third-party-licences # ( with two c's)
Switch to bypass warnings/messages -y
So if you really want to skip all agreements and warnings, it can be done with the following command (but do it at your own risk).
rug up -t patch -y --agree-to-third-party-licences