Just a heads up, the crackdown is not an erroneous scaretactic and is actually occurring in some places.
My experience is that i've been here for a year and have come and go without any issues until last week. I tried to cross the border at Esquel into Chile and when I came back across the guy there only approved me for 15 days. I think I had about 5/6 stamps coming and going from the US/Brazil/Uruguay so he looked at it and said no way. I even tried to go back over there when the same guys weren't on shift and they said no also.
I'm currently seeking residency here under the rentista visa, but have just started the process and didn't have the necessary paperwork to prove that I had done so. As a result, I got 15 days. Well, when I told my attorney about this, he said that I needed to cross the border somewhere else and see what happens. Today I flew to Montevideo, came back, and the guy didn't hesitate to stamp my passport for 90 more days.
Argentina is not black and white and is extremely arbitrary when it comes to dealings such as these. All business matters are the same way. I think crossing at Colonia or any Uruguayan borderpoint you're good to go. DON'T TRY IT AT CHILE!!! and if you do, tell Felipe I said Hi and thanks for making me go to Montevideo to get my 90 day stamp. LOL