Simply plug this USB device into someone’s computer and it’ll turns caps lock on and off, make random mouse movements, type out random text and generally be very annoying.

Handily, the Prankster features a time delay setting, so that after installing it, you can make your getaway safely before it starts misbehaving.

The Prankster is highly annoying, but itll never activate the Enter key or close or save documents, so it’s mostly mischievous, not super-dangerous.

Features:

• Looks like a USB Flash Drive
• Takes over victim’s computer by typing gibberish and controlling mouse
• Time delay

The USB Computer Prankster will soon be available through the Thumbs Up website with the recommended retail price set to £19.99 (about $32 USD).

For all those cell phone blocking fans out there – a new hand-held alternative to last year’s Portable Palm Phone Jammer has just seen the light of day.

Block all ranges cell phone systems including GSM, DCS, PCS, PHS, DECT, CDMA, and even 3G! You can create a dome area of about radius 8 to 10 meters to shield, and avoid to disturb by cell phone calls.

Features:

• Hand-held Portable Universal Cell Phones Jammer
• Suggest to use: Conference room, Class room, Library, Court room, Cinema, Concert hall, etc.
• Operate continuously for 1.5 hours with full charged battery
• Operate Range: Radius 8-10 meters
• Dual miniature antenna
• Hand-held size: 5.8 x 11.8 x 2.2 cm

The Hand-held Portable Universal Cell Phones Jammer is available over at the Gadget Brando website for $246. So, in other words, it will cost you more to block an iPhone, than buying one yourself.

The Phantom Keystroker prank gadget is disguised as a harmless circuit board. Once connected to the USB port of your victim’s computer, it will start to randomly pull off some classic Trojan horse stunts.

Simply discreetly attach the Phantom Keystroker to any extra USB port on your victim’s computer, no drivers needed. The Keystroker emulates a keyboard and mouse and periodically makes random mouse movements and types out odd garbage text and phrases. A simple jumper setting allows you to choose between either keyboard garbage typing, annoying mouse movements or both.

An adjustment pot sets the duration between “events”. We recommend you don’t set it too frequently so as to extend the agony. Your hapless co-worker pal will think his computer has been possessed or infected by a destructive virus. As he writhes in anger and furiously dials tech support you can rest easy with a job well done.

The Phantom Keystroker is yours for $24.99 over at ThinkGeek.