Bitbucket setting to disable merge commits

Feature request.

We use a rebase method and while we can disable history re-writes and prevent any commits from being deleted, there is no option to disable merges. That is something that is forbidden in our guidelines, but unfortunately many juniors don't know how to use git properly per our workflow and eff up our repos this automatic merges. For us, this is a major problem that we cannot block it and atm I am the only one with the power and knowledge to undo their changes. However sometimes they are so extensive there is no turning back...