Exa
Exactly. I run a tekkit lite server and have had to ban more items than I expected. Explosive items that bypass player claims, a couple of weapons that get past the no-pvp, and items like chunkloaders and void chests that bring the server down.
There's also at least one item I know of that duplicates items and that's been banned, and the auto-crafting table also as it crafts banned items.
Most players understand why these have to be removed. You can't please everyone, but its easier to slightly restrict some play to everyone, than to manually deal with everyone who's home gets destroyed.