Comment Telnet client = great, telnet server = bad idea (Score 2) 60
Don't get the server confused with the client. Telnet servers should have been put out to pasture years ago except perhaps on small isolated networks. The telnet CLIENT however is an extremely useful debugging tool for connecting to all sorts of text based servers (FTP, usenet, HTTP etc) and I get really pissed off with some distributions that assume because the server is no longer used neither is the client and so remove it.
Also FWIW , telnet is still the default way to access MUDs and some BBSs.