If your development databases are shared, you should in theory never see any changes listed in the Get Latest tab as everything in the shared development database will be the latest by definition.
Maybe I misunderstand how your environmentis set up?
There's no way of disabling this in the product. Maybe there's a way of configuring permissions in source control so a 'get' is forbidden? If you have an environment where developers can view the contents of source control, and they have write permissions on the database, it will always be possible for them to apply the source control changes to the database, regardless of whether you hide the Get Latest tab.
Red Gate Software