You don't get stability from clowns like Chavez, anymore than we stability from Ortega.
You get insurrections in neighboring countries, and a huge mess to deal with.
But I do agree that we won't be invading. A functional CIA should be able to do the trick (thank goodness we have Porter), just as it did in Chile.
They have already tried that and failed.
Nothing wil be ahppening until after the next US election and even then it will depend on how chavez acts and who is in the whitehouse.