@Phil, I run into this problem with my staff a lot, too. They do learn to check the visibility setting, but it is prone to error. It sounds like you are more worried about comment notifications getting sent to issue reporters than you are about reporters logging into JIRA and reading the comments. Is that true?
If so, one suggestion I read somewhere said to work around this by limiting the issue-commented event notification so it doesn't go to the reporter. Then, create a special workflow transition called "Comment to Reporter" or some such that fires a custom event whose notifications list includes the Reporter. That is certainly a large work-around. Being able to change the default would make this much easier, but that's one possible work-around.
it is not feasible as of now in jira ,
already issue submited with atlasiian, check this
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG