I think the problem is that, very it often means is that the satnav is just in the glovebox etc. To me, any visible mount advertises the fact that there is a good chance of there being a satnav stored somewhere in the vehicle, and it's worth breaking in to have a look. I don't want to have to take the satnav with me every time I leave the car, hence my hidden mount, that gives no clue that I even have one.
That is a valid point, which I do worry about.
I just have to hope they take the "he's taken it with him" option.
To help guide them towards this decision, I leave the Brodit completely naked, rather than leaving the Garmin mount/wiring on it.
The only other option is ****** windscreen mounting, but they suck.