While the idea of Thaumcraft is to start at the beginning and build up to higher things.... given this is a server full of other people, and that negative effects can potentially affect other players, it would be good if people consider their impact on the server when doing Thaumcraft magic.
- Taking care when using the crucible so that you are not releasing more aspects into the world than you need to (there is something to help with that, and it's advised to research and use that as soon as possible).
- Setting your crucible up somewhere where it won't be a problem for others if you raise the flux level in that area (and near silverwood trees is a good idea)
Duck is in the process of building "Duckwarts" school of Thaumaturgy.... which will provide a place where players can go to practice their Thaumcraft in a safer and more contained environment.
We "Strongly suggest" people use something like that until they have researched and created ways to limit their impact on the world.