I've had a few instances where developers have pushed tags accidentally/in error. After this point it's really difficult to get rid of them in a big team as - once they're on the remote - they tend to keep reappearing even if they're deleted as other developers end up with them in their local repos.
It would be amazing if it was possible to restrict who had permission to push tags to a Bitbucket hosted Git repo in the first place. It feels as if it should be possible given that I guess it could be achieved in a pre-receive hook, similarly to how I imagine the branch permissions are implemented?