See also my video: http://www.youtube.com/watch?v=Ein9jsI8U1w
At this moment, that happens twice a day on Glomie's Server port 30000.
I tried Glomie's Server port 30000 (lots of griefing), Wazu Clan Server (my buildings get damaged), Minetest.org OpenMine (server is not stable), GameBoom (building is never possible, registration doesn't work).
These are my ideas:
- Every user should get his/her own area of 50x50 blocks with full height and full depth. A spawnpoint could be set for every user in the middle of that area. This reduces the freedom a lot, but it will stop griefing.
- The fly mode should not be able to fly through solid blocks (like stones or wood planks).
- It must be impossible to place water or lava in a protected area.
- Water and Lava should not flow. Perhaps flowing water could be enabled for some users, or if the water is at least 10x10 blocks.
- Lava should not be possible above 0.
- Lava and Water should not make cobblestone.
- A voting system could be added to minetest. That voting system should also be able to set the map a few days back.