Could well be.
I think an interesting question is - who are the markings for. To me they seem added on after the fact, like they're painted on after, and I think it's odd that there's no logos or markings of any kind on the scavengers or ground bases - which is what I'd expect from a hive entity.
We know Thargoids are Hive-minded creatures, so identifying the drones via a non-unique visual icon seems like it's redundant. It's almost like the markings are an afterthought to identify them to someone/something else that's not part of the hive mind...
It's unclear how large the Thargoid hive-mind is - are they like Ants and Bees where there's one queen per hive/colony (so, one queen for the Oresrians and one for the Klaxians). Or are they a more social hive-mind where there might be multiple queens controlling multiple hives/colonies all working towards a larger goal (so, dozens of queens working together form the Oresrians and another set of dozens of queens forms the klaxians - but there's no/little interaction between the hive-mind of each queen, so they need to communicate in other ways to co-ordinate group efforts?)?
If it's the former, the presence of external visual identifiers might indicate that they marks are for human allies to identify individual drones - for example (we know Thargoids have human allies).
If it's the latter, it might be to identify which drones belong to which queen - though why this would be necessary is a question too.
Same sort of question applies to why they'd need to stamp the logo on the Barnacles - all logos are the same, and there's no Barnacles without logos, so it's clearly identifying them someone else - or, the Barnacles aren't of Thargoid origin and they're just using them, but then... why paint it on the drones too?!
