Lets call a spade a spade.
This is definitely not done !!. one should not replicate the national icons of other countries.
Constructing rock buildings/temples are not a threat to nature. So, I am okay, plus someone has the money, let us share it to the masses some way.
But, coming to the 'Intellectual Piracy', esp. regd that Angorwat, we should know that the King who built that was a Vaishnava. He must have been attracted to our hindu philosophy plus, the architects/artisans were from India. Just that, it was built outside India. Our indian wisdom never had any patents since the dawn of its emergence, so how is this a big issue?
Plus, from the link:
VINA - Vaishnava Internet News Agency - Angkor Wat (Vrah Vishnulok)
Angkor Wat, originally named Vrah Vishnulok - the sacred abode of Lord Vishnu, is the largest temple in the world. It was built by King Suryavarman II in the 12th century. The Sanskrit Nagara (capital) was modified by the Cambodian tongue to Nokor and then to Angkor. The word Angkor is derived from the Sanskrit word 'nagara' meaning 'holy city'. Vatika is Sanskrit word for temple. "The city which is a temple,"
Angkor Wat (Nagara Watika) is a majestic monument, the world's largest religious construction in stone, and an architectural masterpiece. The Khmers adhered to the Indian belief that a temple must be built according to a mathematical system in order for it to function in harmony with the universe. Distances between certain architectural elements of the temple reflect numbers related to Indian mythology and cosmology. The sheer size of the place leaves visitors in awe.
"The Khmer took everything from India, from irrigation to astronomy and including Shiva and the rest of Hindu religion...And the Khmer built Angkor. ""The Khmer civilization was the most important, the most brilliant and original in ancient Indo-China. The brilliant achievements of ancient Cambodia were due primarily to the country’s wealth of natural resources. No other country of the peninsula could boast of such an unbroken extent of fertile and well-watered. Cambodia, being a strictly defined and admirably situated geographical unit, was the cradle of a powerful and gifted race."
"But neither favorable environment nor limitless resources nor years of peace would have sufficed without the spiritual contribution of India."
"India was the spark that fired the blaze."
Bernard Philippe Groslier (1926 -1986), a French conservator and archaeologist
"I've seen the Pyramids in Egypt, the Parthenon in Athens, the Great Wall of China, and the Rome Colleseum, but I think the Temples of Angkor Wat beat them all. "Think of the world in the 8th to 15th century, when they were burning witches in Britain, and Australia and America hadn't been discovered."
Angkorwat, churning of Milky ocean
Also, I guess, all the eastern India (incl. islands) were ruled by Varman, whose descendants have migrated to south india.
Varma - Wikipedia, the free encyclopedia