Put them on the car hidden somwehere. They are advertising the engine (really what hillpower is about) so maybe somewhere under the bonnet hidden when the car is moving, but visible when the engine bay is open. There is a sill on the front arch that they fit on nicely. Then when ppl look at the engine they see the sticker, but nobody else does. More subtle that way. Also the door sills could house them.
Take the alarm ones off mate. Why help the theives by telling them what alarm you have? Any thief will know a clio williams will be alarmed / immobilised. No point giving them the information on the kind of alarm you have. In theft every second counts. Let the fcukers figure it out for themselves. If you want to put a sticker on saying your car is alarmed, just get a generic alarm / immobiliser sticker and put that on.