Some years ago i worked at a local Internetprovider.
One day a client with a technical problem phoned me.
Client: I can't connect to the Internet.
Me: Did you check whether your modem ist turned on and correctly plugged into the socket?
Client: Of course it is turned on and plugged in. Do you think i'm stupid? But i had to use a hammer to get the plug into the socket.
Me: You had to do what?
Client: The plug did not fit into the socket ...
Me: Can you please describe the plug?
He describes an ISDN-Cable.
Me: Do you have ISDN?
Client: Why? No, thats to expensive, but i want to use the Internet now!
Me: I'm sorry but i can't help you with your problem. Maybe you call your Phone-company and explain them how you HAMMERED an ISDN-plug into a socket for analogue phones.
Client: ... *click*
Never heared of that client again ;-)