If you're going to have a bunch of people making massive lava pump setups, wouldn't it make more sense to just have the administrator of the server set up a liquid tesseract pulling from a massive lava tank which is refilled via whatever administrative means (the Duplicator from TubeStuff, if you have the ultimate pack, is likely the best choice for this using lava cells).
Just make the cost of entry the materials needed to make a nether lava pump system (BC pump, four redstone engines, liquid tesseract, two levers, etc) and then set up the liquid tesseract for them. No more mess of having the nether or a mystcraft world end up raped and ruined from pillaging a plundering.