People who stop in doorways.
My theory is it's an evolutionary throwback to when we lived in caves and you had to stop in the entrance and check there were no sabre-toothed tigers there, or something. Or they're just ignorant cunts.
Also people who wait till the till monkey tells them how much their shopping is before looking surprised and then commencing a search for their purse / wallet longer than the one for the Higgs Boson. Do they think that one day they'll get there and the cashier will say "No, go on, honestly, it's all free, Tesco is just giving stuff away."
(localboy purveyor of pisspoor puns, Thu 4 Oct 2012, 22:14, 4 replies)

This ^
And the same for ATMs. They always want the card..
(BeatsWork, Thu 4 Oct 2012, 23:51, closed)

Today
I got stuck behind a woman at the Tube station counter. She asked for a ticket, and then *after* she was told how much it was, she then opened her bag and started the 30-second rummage to find her credit card.

How thick must you be not to get your card ready earlier?
(EuroSong I love horse meat: best of all the animals, Fri 5 Oct 2012, 1:37, closed)

Equally irritating
People who, on being charged £9.88, spend the next five minutes fumbling for the exact change, blissfully unaware of the queue building up behind them. Then, after an eternity of saying "Hang on, I'm sure I've got a 1p coin in here somewhere", they finally admit defeat and hand over the crisp tenner they should have used in the first place.
(lolwhites, Fri 5 Oct 2012, 9:33, closed)

This is ^^ and then some
How about stopping at the stairs - of a busy railwaystation. Just to talk to someone you could just as well converse with some 2 meters away from the top of the stairs, out of the way of the hurrying people.
(bovine intervention, Fri 5 Oct 2012, 21:05, closed)