An advert in a car mag with a thing called a clutch claw that cost £90 reminded me of this,a guy at work do this to me for a laugh when I was away for 5 mins and it took me a while to figure out what was happening(I didnt actually figure it out he had to tell me when he stopped laughing as I thought the van was broken) he used electric tape but cable ties would be just as good it works on manual or automatics when your vehicles parked up for the night or its going to be left for a while either tape tightly or cable tie tightly the brake and throttle pedals or brake and clutch pedals if its a manual or all the pedals if you want ,together just behind the foot pad on the pedal lever and when you try to drive or use the clutch it actuates the brake just remember to cut it off before you use it again,try it on someone you know without them seeing you do it and see how long it takes for them to figure it out whats wrong then think if it was a thief with 1 brain cell and it might just deter them or maybe they will make enough noise that someone hears them and to within an inch of their lives its a bit cheaper than 90 quid its just an idea,Don