Indian govt.has made tourism illegal in these islands
Answers
Nicobar islands houses one of the most aboriginal tribes of the world. Till date, they have not been brought in contact with a civilised society.
The Indian Government has hence taken this step, so that any other tourist who visits this island tries to capture the land, by killing the aborigines.
There is also no guarantee the new visitors may make any difference in retaining the sanctity and biodiversity of the region. It is much better the islands are cordoned off no matter what the people have to say.
To add to this objective, the Indian Government and courts do not persecute the islanders if they kill any visitors, which they would obviously do.
In Nicobar Island and Sentinel island Indian government has banned tourism, which means entry of the tourists are banned in these islands.
In these islands some tribal people reside who are completely isolated from the civic world.
These people do not want to mix up with civilized society as well.
They have a proneness to kill intruders in their island.
This is the reason, tourism is banned in these islands.