To sell an 868MHz product in the EU it has to conform to current standards. Those standards are controlled. The company I work for activley looks at
868MHz products and tests them to see if they fall foul of the usage rules. If they do they are reported and the equipment is usually removed from the market place. In this way it is controlled. Rulled AND controlled.Do the work yourself. Get a copy of REC70-30. You will see that there are no band occupancy rules. There are for 868MHz and this is one of the reasons why 868MHz is a much better band for security equipment than 434MHz.
The ONLY official documents - REC70-03 (Europe) and IR2030 (UK).
If you actually bother to study the documents you will see that bands set aside for security equipment cannot be used for other non compatible equipment. For example audio. And there are strict band occupancy rules that are tested for at approval stages of product design.
On the subject of wireless jamming detection, why don't you get a copy of EN50131 and check out the class 1-4 jamming detection requirements. Again, for security equipment to pass EN50131 at any class it has to provide defined jamming detection and reporting. All an installer has to do is buy an approved wireless system to get a reliable wireless system. You get what you pay for. If you buy a product that doesn't meet any standards then you get what you deserve.
Paul, why do you bother to 'pretend' that you know what you are talking about?. Be subjective not stupid.
So, just to repeat myself once again, you are wrong as usual Paul.