Here in the [M]ed, I’m very anxious when parked bow-first to the pier [...] with my boat, which has a prominent prop-walk. The problem is that more or less in line with the boat is a block underwater tethering the mooring for the boats to the left and right. Often enough, those blocks are set in a way that I have about a boat-width of free space for the bottom of my keel.
First off, your fears are totally justified. That set-up, so common in parts of Europe, is a real pain in the neck and fraught with potential for disaster.
As an aside, I once, while in northern Spain, saw a catamaran foul not one but both props on the offshore lines while attempting to go stern-to in this kind of set-up—not a fun day.
Several other members have commented with suggestions that have merit, but I'm going to concentrate on the boat handling aspects of the problem.