Gillywoo
As you say common sense and tolerance should be expected anywhere not just in Greece. Would you be happy to have your evening meal sitting next to a shirtless smelly person. I don't think so.
Why not just enjoy your holiday and try not to concentrate on what the person at the next table is doing, sometimes it is very easy to become fixated on something that it almosts becomes an habit and dare I say a talking point instead of enjoying conversation/time with partners/husbands/wives etc. Greece is Greece and we cannot expect them to change, I am sure they have more important things to think about at the moment!
Personally I hate the smell of TCP which some people of a certain age seem to use has Eau de Parfum, in some of the taverna's this year the smell was overpowering but I accept that people have the right to dab it freely, it is their choice which I accept in fact even the smelly shirtless smelly person also has the right to dine where he/she chooses to do so along with the tattooed man, the scowling person who stares at you throughout the meal, those who like to chew with their mouths open displaying the contents of their meal, there are many off putting things when you think about it but for me personally I try not to think about it as I am having so much fun.