For example: a question is originally tagged "jsp servlets". Is it fine to retag it to "jsp servlets java". Same goes for the case when asking a question.
- this will allow more people who are watching the "java" tag to see it and eventually be helpful
- it will also mean that it will be "uninteresting" for others in the "java" tag who don't have experience with jsp or servlets.
- it might be considered 'polluting' the "java" tag with questions that are only indirectly related to java (by virtue of being written in java)
("java" above is just an example, same goes for every language)