I find this very frightening…
(part of) Comcasts Customer Agreement:
(b) Posting of Content. Comcast assumes no obligation to monitor transmissions made on the Service. However, Customer acknowledges and agrees that Comcast and its Underlying Providers shall have the right to monitor such transmissions from time to time and to disclose the same in accordance with applicable laws, regulations or governmental requests and to operate the Service properly. Comcast and its Underlying Providers reserve the right to refuse to post or to remove any information or materials, in whole or in part, that in their sole discretion are unacceptable, undesirable or in violation of this Agreement.
Ah… the 1st ammendment… who needs it?