If a Diamond supporter is flying in town and they fly in town why the hell would they be using fly hacks and if they were using a client or modification to fly solely in the town why would it matter because they would be entitled to fly. You can filter messages about diamond supporters flying in town
This isn't something that will be added to EMC permanently. It may however be a temporary perk for a few days if EMC reaches an incredibly hard goal that is set - like the "reach #1 on Minestatus for 3 day flying in town" - in the future. Currently it has no real place on our server though as we're french-vanilla, survival and allowing flying on all regular SMP's partially voids that.
No thanks to this. Although it would be helpful for builds, it would be too easy to build a large structure and I like the feeling of accomplishment when I build something awesome in town. For Utopia it's fine because, like mentioned above, it's like a playground server.