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Maybe you can make a list of those who do the same.

I really don't know how!

LOL. You can just keep a list of those you find. For these list posts I run queries on profile data and then have a script that checks who is active to create a post. It can be done manually if that is manageable. I do this for fun really.

I just did a query of terms like 'world' and 'nomad'. It found a few hundred people, but some of them may not actually be travelling. Only a dozen or so say they are nomads.

How are you doing this? I think you need access on Database query, right?

@HiveSQL is the key. It's not too hard to use really, but then I've worked a lot with databases.

Ok, this here? I have to Register?
https://hivesql.io

Dokumentation is also available there?

That's it. Just have to pay 1HBD for access. There are various GUI tools to access it, but I am using Python scripts. As well as the documentation there are a fair few posts.