What is so evil about a Flash based website?

Question

I have the feeling that Flash-based ( or Silverlight-based) websites are generally frowned upon, except when you are creating games or multimedia-content rich applications.

Answer 1

I don't install Flash on my browsers, mainly to escape the nuisance of animated ads, but also for all the security and privacy reasons mentioned by others.

So sites done completely in Flash are nonexistent as far as I'm concerned. (W.r.t. Youtube, I download videos directly into Miro.)