for the one or more of the following reasons: (1)being too lazy to reply
( 2) getting off on leading people on and keeping them waiting for nothing
(3)too busy thinking up their own arses with greed

Some people don't have the time to respond to every message that they get. I don't myself. Why should I put everything else to the side for somebody that holds no interest for me? If somebody can't be arsed to make themselves interesting I can't be arsed to reply, that's for sure.
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Vidi Vici Veni

I got in touch with my feminine side. She emailed me back saying if I ever contacted her again she'd call the police.

I did not realise that we were instituting 'an answer every message gestapo'. This as far as i understood was a place to meet without any form of threat and punishment if you did not answer a message.

Remember the person may have moved on and is just hear for the discussions, or the person who has messaged them just does not appeal and thus the message is not answered. The last part is not a crime is it?

marry those responses just do it