Say one was to take a laptop on a plane and log on to pokerstars, in which of the following countries could you legally play in?
1) Columbia
2) Ecuador
3) Peru
4) Chile
5) Argentina
I don't know about Colombia or Ecuador, but I don't think you would have any problems in peru, chile or argentina. It's 'grey' in all those countries, much as it used to be in the US/Europe. They all have a gambling culture with large land based casinos (I went there for a couple of months last year).
My guess is the other two would be the same.