I guess every public internet policy should now include a clause such as "We reserve the right to not do any business with you if we don't like you, regardless of any other provision of the policy".
At least, it will be honest.
PS. Variations may include: "...if we don't like you OR we don't like anyone you like...".
That's already in most policies without qualifying it's because they don't like you.
Here's an example:
> We also reserve the right to modify or discontinue the Service at any time (including, without limitation, by limiting or discontinuing certain features of the Service) without notice to you. We will have no liability whatsoever on account of any change to the Service or any suspension or termination of your access to or use of the Service
The right is reserved, no need to give any reason.
At least, it will be honest.
PS. Variations may include: "...if we don't like you OR we don't like anyone you like...".