It seems based on all the discussions from all the threads that one could deduce the following with respect to the 90-day visa:
That while it should be objective, ones experience and outcome is almost always personal and subjective. Sure the law/decreto/regs what have you say 'X', but the application of the law is done by people and so application will always be unique, even when done by the same person. (Maybe today migraciones officer forgot to have his coffee, maybe his girlfriend walked out on him...who knows.)
If you think the law is "black & white" you are not in the real world, especially when applied by mid-to low level functionaries. (You never had a cop let you off of a speeding ticket? You never had some county clerk help you out with a "ok, but next time you have to do it this way?" All the time. And I would think that in Argentina with a more nuanced attitude towards rules, that this type of thing would occur all the time. As I think MizzMar pointed out..."hey cute girl comes up to immigration officer..and no problems". It happens
There is also a huge difference in how you are going to be perceived, just the same way people have described: guy with 14 entry stamps versus 4. The law theoretically should be applied the same way, but I guarantee it is not.
Bottom line: You will never get the answer to: "Will they turn me away at the border tomorrow?" until you go to the border!!
Steve, Alex, Jurist and others have spelled out the rules very clearly. But they nor I can tell you what's gonna happen if you come through the border in El Calafate after an overnight flight to Morocco in which you pass through customs in Cape Verde Islands, buy a sandwhich and then get back on the plane, accidentally drop your passport in the toilet, but had lunch in Colonia last weekend, with an Albania musician friend who went on a date with a migraciones officer that loves LAdy GaGa
end of thread?
Oh, and if it is "perma-tourists" propping up Palermo then well, it must not be that nice? Do you really think a couple, let's be generous and say thousand Skidmore/Lehigh/UCSB college grads living off their "graduation money" is keeping Palermo afloat. I would bet most expats with money and I mean "economy moving discretionary income money" are here working, have investments in property here, or have found a way to qualify (trusts, 401Ks) for visas and not "permatourists".
I do think qualifying for a visa is not so simple as just "get legal" (if it is please PM me), but perma-tourists are not "immigration reform" issue or an impending economic meltdown. At most it's some petty political powerplay.