I doubt that. For instance, I know several Argentines who own homes there- in Colonia, or Punta Ballena, or Balneario, or Jose Ignacio. None of em are going to pay attention to "the media" about this- they are going, every year, regardless, and, if their full time neighbors tell them its more dangerous, they may buy webcams, but the idea of not going for the month to Uruguay is not even considered, until you see Portenos being machinegunned in downtown Punta, which, clearly, is not happening. Most of the uptick in crime in Uruguay is taking place in lower middle class neighborhoods of Montevideo, and in the Brazilian border smuggling towns of Rivera and Chu.
Its certainly not good, but its effect on Cabo Polonia or La Barra is really minimal.
In January of this year, I was on the beach, and there were still plenty of wealthy argentines oblivious to the drug related crimes taking place in La Paloma Tomkinson.
I literally saw Argentine movie stars wearing rolexes leave their purses on the beach while swimming.
Its going to have to get a lot worse before the reports of crime affect those people.
But for the average Argentine, if their income drops 30% due to inflation- THAT will make them skip their trip to Uruguay.