Spare tire carrier or tailgate mount?

The Exo looks pretty solid once I saw that it ties in to the rear rollbar mount. The only thing I don't like is the tire sitting up so high / blocking the rear window. Is it really noticeable or is it just how it looks in the picture?
 
Yes, ok, I wanted to get a lock.

I've used a cable lock on my spare tire and jerry cans. Thread it through the tire's wheel, through the jerry can handles, and then lock it up with a keyed lock between the swing arm and the tailgate.

By the looks of it, you can easily do something similar with the Exogate.