Building cheaply - this is how it can be done too!

That is already quite good. The 7 seconds, the noise, and the effort seem to be sufficient so that it is practically never done.

Just had a look as well, that is nicely loud,

I do not deny that either. Somehow the message does not get through. A roller shutter is not even an obstacle. It is relatively easy to overcome. And the more you then seal off your house, the easier it becomes. So, if someone wants to get in, they will get in.

That is clear as well. But nevertheless, the roller shutter is an obstacle. It just takes a moment and has to be overcome, just like with a normal mushroom head lock. You can still get in; you just extend the time, and that is exactly what the roller shutter does. And if someone makes noise, you are definitely awake in the house and turn on the light.

Especially with those who "secure," there is something to gain.

Doesn't really matter, I'm often away on business during the week and my wife feels safer then, so the extra cost for [elektrische Alurollladen] was definitely worth it.