I think posts such as these demonstrate "fear mongering" as a means of driving people into nationalistic fervor. India cannot annex Nepal or Bhutan simply due to the fact that is in the process of establishing itself as a regional power and a responsible power at that. Annexation of two sovereign states that are part of the UN is a violation of international norms. In addition, do you think China would be happy to see its regional competitor gobbling up states in its periphery? Fortunately, Indian elites (or political elites of most states) understand the need to deal with international situations with restrain. We can talk about hypothetical situations, but all these "strategies" as put forth here are nothing but a shallow analysis of the situation on the ground.