If this IS the case it sure would be nice if they gave precise reasons why a site had been banned instead of canned responses.
Banning a site could easily cause irreparable damage to a company and to think the company had no way to defend themselves is sickening. Its clear to me that competitors can and do have a direct affect on our sites. The redirect/hijacking issue has convinced me of that.
Y! should contact each and every site they plan to ban. Innocent until proven guilty is a nice start - I have always worn a white hat, yet I have several sites that seem to be banned. I assure you its not of my doing, yet I am the one that suffers!