There's a glitch with towny that lets everyone break things they shouldn't break. this includes private plots and houses people have built. I don't know if this is only my towns problem or that others could have that as well. if there's a command for it to change that, let me know.
We have tried:
/town set perm (all)
/plot set perm (all)
please give us tips or give us information about the problem
Verse and the rest of Palladia