Brainwashed? Controlled? Do you even know how a country is run? A King in a Constitutional Monarchy CANNOT touch the law or government. Since This is the Case, this answers your question about the vandal. The King's Law or Code of Conduct of the King of Thailand Forbids it. Therefore, even if HE WANTED TO, he simply cannot because there will be more conservative people around him not allowing him to know of the matter or be able to do so.
The reason WE Thais believe the King is supernatural and superpowered, is simply because of the great deeds that he has done for the people. Brainwash you say? Well, if the current King was an abusive, foolish, evil king, then no one would be listening to him or living him as to gather in the hundreds or maybe thousands on his 60th anniversary since his ascention the throne. WE choose to love and cherish our king because unlike some of your country's kings, presidents, and prime ministers, our king stepped out of his comfortable palace to help the people, to make the lives of all Thai people better, even just by a little bit.
Believe you me, the people CAN criticise the king, we simply choose not to. Even if there is a law, even if there is NO law against it, we will never ever think of betraying our King Bhumibol Adulyadej. It is OUR choice to believe so, even if deep down inside we know it is not true.
But hey, this is all just a comment by a law student, listening to many influential people or people used to be influential to Thailand going on and on about how OUR COUNTRY, though may seem as not so advanced, was blessed by a great king. In other words, we may not be as advanced as the countries you so call 'advanced' or 'civilized', but we have a long history with our kings, and a living proof of our kings' great lineage and deeds in the current king of Thailand. So to you who say we are brainwashed from childhood, WE KNOW IT FOOL. WE KNOW IT, BUT WE LET IT, BECAUSE THE KING REALLY IS GREAT!