May have to look into getting one mate living round here. Been needing to get gates put back on the driveway, but even they'll get nicked. Used to gave gates but pikeys nicked em when they made an illegal site round the corner, got up one morning and they had gone.
Although it won't stop anyone but it might alert you seeing as your bedroom is at the front and also scare people off you could get something like a window alarm and put it on the gate and flick it to "on" just before you go to bed or when you get back from work.
Cost of £5-£15 might be worth having a go. just put something waterproof around it and spray it black or same colour as your gate. Although the post man might also have a fright but that depends if you have a post box at the end of the drive of not as well.