iPhone - The key to celibacy is showing off your latest app to girls (ok, your sister).
Xbox 360 - Is a worthless piece of constantly breaking technology. My two are now door stoppers.
Pager - I nearly fell over when I saw someone using one the other day.
Microwave - If you want your food soggy and tasting of the plastic container it came in, look no further.
Clock radio with a CD/ipod player - How much pre-planning do you morons need for an alarm call?
Flying bug/helicopter things - great until you try to control them...they go up, no particular direction and then crash and break. All for £30.
Wireless keyboards/mice - "oh the battery ran out...hum..." *fetches wired alternative.
Faux Leather car seat covers - Name says it all. (though not strictly a gadget)
Bluetooth Headset - How to look like an obnoxious fool with your mobile phone.
USB Cup Warmer - Liquid near electrics, great idea.
Anything adorned with the words "ideal gift", "father's day", "stocking filler"...do me a favour, donate the money towards supporting terrorism.