Seriously...

Can people not manage to complete a phone number in the right order?

I would like to let the world know that 5.50am is a highly inappropriate time to dial the wrong number. It's also very bad form to let the phone ring for just long enough to make sure the sleeping person is wide awake before hanging up.

What's even worse is withholding your number so that the poor, suddenly awakened victim isn't able to call the number back and shout viciously at the culprit.

Grrrr.
That's all.