Watch Out !!! Is not theft by far

Have this roof rack for about 2 years now in use and was actually technically and very satisfied by the application here. One of, if not the most important selling point was that I can shut off this bike rack. So far so good. I must say that I have since weighed me false sense of security now but. Unfortunately ...
On my recent vacation trip to Sardinia my bike from sealed (!!) was stolen bike rack. Since I myself am engineer, I first asked me how you manage that. After some thought, I'm draufgekommen that there is nothing simpler than the wheel to steal from this roof rack (and possibly also other types of similar design). I, I will not describe how that would go no guidance on the "how" will put on the Internet. Let yourself but please be assured that a professional might need 10 to 15 seconds and the bike is gone. The irony of the matter is that the roof rack itself is not even a going really broken, at least for me that was.
So if someone with the idea of ​​playing this roof rack buy / use, then please be sure to (!!) a not too cheap additional bicycle lock (from best with a thick chain) schedule, gesichtert with the bike right on the roof rack or roof railing becomes. Doing so could you go like me. I'm going to make an inquiry in parallel with Thule what they think so assuming that weighing Käufter false sense of security. Should I get a sensible answer, I post even this.