I know relying on names to recognise onion addresses is unsafe, but so is following random links. Why not add at least a little recognisability to the official URL?
Because it doesn't help at all. The first four letters of an onion URL are unimportant because they can be chosen with little effort, as you describe.
Following random links and following random links that start with "zlib" is the same thing.
As you said, it's effectively the same thing, so why not do the tiniest amount of effort and generate some slightly indicative address?
My argument was going to be along the lines of: "a stupid computer user who knows the real address starts with zlib would be tricked easier by another zlib address than if the real site were random, where they might check more thouroughly that they were on the right site..." before being fooled, anyways, probably.
Torrents can be obtained via their onion site: http://2urmf2mk2dhmz4km522u4yfy2ynbzkbejf2cvmpcbzhpffvcuksrz... (requires Tor to follow link)
Using onion.ws proxy: http://2urmf2mk2dhmz4km522u4yfy2ynbzkbejf2cvmpcbzhpffvcuksrz... (doesn't require Tor)