This even applies if I pay a taxi driver to take me to the site, and he pays the bribe.
If I'm paying a bribe for safety purposes (say giving a bottle of scotch to pass a checkpoint to get back to the hotel before night), then if I'm lucky I won't be prosecuted when I return to my home country.
The great thing is I don't feel guilty about not tipping in the US.
"Facilitation payments, which are payments to induce officials to perform routine functions they are otherwise obligated to perform, are bribes"