Tell us WHICH guideline we "may" be violating instead of

"...it has come to our attention that you may have violated the TOS(http://www.yahoo.com/r/ts). Please reread the TOS and cease any use of your account that may
violate the TOS.
If your use of your Yahoo! account is brought to our attention again,
and we believe that such use violates the TOS, then we may terminate
your account without further notice ..."