I think it's OK to ask for donations from people. After all they are called DONATIONS. My problem with Tazmo is that he has that NarutoFan PLUS membership which is extortion of Kishimoto's own work. I'm not really sure if NarutoChaos has the same problem of exhortion but I guess their way of doing it is that they have a monthly quota and once they reach it they dont ask for anymore. I'm not really sure if thats the same thing that Tazmo does though.
On the other hand, if members wanted to donate i dont think it would be bad for the admins to accept donations. Its a DONATION afterall. But i guess asking/begging/imploring for donations is out of the question.