It can also happen to those traveling under the VWP program, with far more inconvenient consequences (you'll be turned around at the port of entry, wasted airfare and no right of appeal).
Do you sincerely think that the US embassy here is not aware of the whole permatourist thing? That they are stupid enough to not recognise that someone with entry stamps every 90 days is a permatourist? Remember that tourist visas are about intent.
If you intend to stay here for ever and get stamps every 90 days, I would think this theoretical US consular officer would seem far more likely to read bad intent into that, regardless of whether it's permitted under Argentine law or not. Remember that he is considering whether you're an overstay risk in the United States, not Argentina.
Both overstaying and having a million stamps back and forth from Colonia mean a risk when you apply for visas to countries like the US or UK, because you're right, if they ask the right questions and you tell the truth, it's likely to cast your application in a bad light.
Having pages and pages of stamps for every 90 days means they won't even need to ask the question, it will be immediately obvious! Sure, if you overstayed they may ask you to prove your residency, but then again, they might not. They might assume you had some kind of residency, or that you didn't get an exit stamp, or that you exited on a different passport, or any one of a dozen different possibilities.
If you're worried about keeping your nose clean for easy visas and visa-free travel, you might want to consider some option other than either of these two!