The Notepad++ project is seeking the public’s help in taking down a copycat website that closely impersonates Notepad++ but is not affiliated with the project. There is some concern that it could pose security threats—for example, if it starts pushing malicious releases or spam someday either deliberately or as a result of a hijack.
I hear ya though. I usually filter by IP for dev sites for the same reason. It’s not 100%, but it keeps them from getting indexed. I don’t think there’s anything interesting enough to make an effort worthwhile in my case anyway.