We all greet people by doing Namaste when we meet someone we know. It is a traditional way to show respect and discipline. But, we should not do Namaste to anyone. There are disadvantages of doing Namaste. There are also some limitations for doing Namaste. Here are those lists of limitations of doing Namaste.
It is not good to do Namaste to those people who are going through the period of mourning days. The mind of the people at the time of mourning days does not work well. Therefore, it is better not to do Namaste.
It is not appropriate time to do Namaste to those people who are bathing because they may hesitate.
It is not right to do Namaste to foolish people. We may get bad reactions from those foolish people after doing Namaste.
When People are Far
It is better not to do Namaste to those people who are a bit far from our sight. Those people may not see you doing Namaste and you may feel bad.
We should not do Namaste to those people who are running because it may divert their mind and they may fall down and get injured.
People in Water
We should not do Namaste to those people who are swimming. It diverts their mind and they may lose control which may drown them.