1) Cold callers. Cold callers are bad enough but when they come from some callcentre in India, they're very annoying. Haven't got a clue what they're plugging and are easily thrown off their spiel sheet by you saying "Pardon?" a few times

2) Automated call centre computers that ring and then hang up when you answer because there's no operator available to take the call. Damned annoying. Four of these today alone.
Discuss.