Dear PENKO, ZONNAIR, NVpilot,
As said by NVpilot, I did armed it in flight (not a simulator) at FL350 to test it after reading the original post.
Saying that that is dangerous, people moving in the plane, bla bla, bla bla, is stupid. Those of you who alledged that what I did is dangerous, you have no idea of how the system works... and that is dangerous!
APP briefly armed at FL350 (as it was the case) will do nothing! Even if you do by coincidence have an ILS frequency in the area where you are equal to the one you entered in RADNAV page, and the aircraft receives it at FL350 and captures it, then the only thing you have to do is press ALT or pull HGD. That`s it!
And no, it will not pitch down, because it will do LOC* before...
And here is another hint! Press ILS switch on FCU, as I did... and if you see no LOC or GS indication... the aircraft is not receiving any ILS signal, hence it will capture nothing!
So dangerous what I did...
Cheers