Sad but useful advice.
Also sad to say that virtually none of this applies in Thailand. I have walked through the worst slums on my own late at night and driven the country top to bottom. The biggest dangers are actually stray dogs, and there are usually enough big sticks lying around to deal with them! Muggings and pickpockets are rare, but "scams" are common, so they main advice in the Land of Smiles is to avoid talking to strangers.
Ian