I can add to this...
... the particular group of chavs on my bus home from work (unemployed, "no point getting a job when they're getting the dole" from their loud drunk conversations) who've taken to using external speakers with their phones to make the "music" even louder, more tinny and more distorted.

* Bus drivers who stop at lights, then rapidly alternate between accellerator and brake so luggage falls, drinks are spilled, dogs whine and babies cry.

* Parents on busses/trains who seem to have an aversion to paying any attention to their kids when they're on the bus and sit looking at nothing while their kids run wild/cry for reasons that are obvious to everyone but the parent, etc.
Especially those who don't seem to realise that if your kid is strapped into a pushchair tight and pointed directly at a skyborne nuclear fireball, it might be a bit painful and they might cry. Oh, no it's "Shaddafakap, Chantelle!".

*The complete lack of a GPS or 3G signal at inopportune moments on the way home...

*What must be a 100% utilisation of the GSM network on certain bus routes by 14-year old girls all texting each other and their friends and not sticking their phones on silent. Or anything less than "F22 at take off" volume.

*groups of teenagers fnaarring at orgasm ringtones that sound more like they've had their toes run over than an actual orgasm... especially when suffixed with "aw, man. Now ah've got tae gan an' change ma troos." *apologises for inability to type Aberdonian*
( uberdeity Wondered why Owen Lars knew of the term "hell" on, Fri 2 May 2008, 13:51, Reply)