But you can be sure some sado will have done - walked it even and taken photographs.
Not the short route!
I did check to see if the Tannerman sighting and the Smithman sighting matched up. So I tried going east as per Tannerman, then I nipped up north between blocks 2 and 3 (opposite block 6). There is a pedestrian walkway with high walls on either side, high enough that a person in it is completely hidden from 5A, so it seemed like a good choice.
At the north end of this, I went left (west) along the front of block 3 to Rua Primeiro de Maio, and crossed it into Rua do Cemitério and headed past on old villa to a walkway that runs down the east side of Estrela da Luz. (That walkway is not shown properly on Google maps). I then headed directly south to the Smithman location.
Basically, I tacked on perhaps 150m on top of the shortest route.
I was surprised to find it took 4 to 5 minutes at a normal walking pace.
You might get photos on my next jaunt. The photos are important.