Photo Illustration by Luis G. Rendon/The Daily Beast/Getty/ReutersAs a teenager, Prince Vacharaesorn Vivacharawongse, the second son of the present king of Thailand, was left in little doubt about the contempt in which his father held him.Not content with banning “Vach” (pronounced “Vatch”) from the country along with his siblings, his father, the mercurial King Maha Vajiralongkorn, refused to pay his school fees at Harrow. His half-sister from a later marriage, Princess Bajrakitiyabha, was inst