Looking at pictures of the protests at Bangkok airport, I noticed that the yellow-shirted protesters had removed their shoes before sitting on mats. Sensible asians.
I do think it is dreadful when you see British people sit on picnic blankets with their shoes on.
The protests in Thailand are very interesting, but I have no idea whether my sympathies are with the protesters or the government. The government were elected by the people, but then I understand that electorates can easily be manipulated by oligarchies.