It is currently usual to have several reports of the same bug.
Example: the bind of fast forward is on E for helicopters, with no way to change it without going into configuration files.
http://feedback.arma3.com/view.php?id=1172
http://feedback.arma3.com/view.php?id=1808
http://feedback.arma3.com/view.php?id=2798
http://feedback.arma3.com/view.php?id=4184
http://feedback.arma3.com/view.php?id=4353
(not even sure I have them all)
I think it is harmful because it spreads the voting on several identical issues.
All of the instances of one issue (well, most of) are useful because they sometimes bring new information and mainly because they give a new chance for an user searching for this issue to find it and not to create another.
What I am proposing to solve this problem is to provide a way to link identical issues, and maybe to unlink it if someone decide that it is a slightly different issue.
All the votes for the linked questions should be merged, and the linked issues should be shown at the top of each linked question, the oldest first.