That's cute. You think you know better than millions of intelligent people who make complex choices every day.
I'm sure this is not legally standing, however it is amusing they'd attempt to restrict your links."You are granted a limited, nonexclusive right to create a hypertext link to the homepage of the Sites, provided such link does not portray Cingular Wireless or any of its products and services in a false, misleading, derogatory, or otherwise defamatory manner. [...] This limited right may be revoked at any time.