IllegalStack has a couple of options that should be used with care these two options are :
Settings.DestroyBadSignsOnChunkLoad:
Settings.RemoveExistingGlitchedMinecarts:

These two settings are very special case settings and should only EVER be used if you have
A) Signs that were put in with a hacked client < mc.1.11
B) Minecarts that are glitched inside blocks

There will be very few server owners that ever need to turn either of these options on. This update will now post a warning message to the log if they either of these two are turned on via the config, and it will also automatically disable them when the plugin shuts down. If you need to use either of these two you'll have to enable them every restart, again they should only ever be used if you FIND that specific problem on your server, as scanning each chunk for something on the tiny chance it might have been affected by one of these exploits is really not a good idea.