someone tell me why if I place down a stack of bloody sponges on sky grid, some hacking <edited> is able to walk over and destroy all my stuff and loot all my LOCKED chests...... taking with them around 200 emeralds and 500 diamonds

 

1. my furnaces full of coal were looted even though they were sign locked.
2. wouldn't u be mad if some <do not cuss on forums> took that much stuff off u
3. the info about the sponge plugin update would've been useful before I got raided
4. how did they get into my sign locked chests and furnaces
5. how did they find my base in the first place considering its a quarter of a million blocks from 0,0

 

Are you sure your chests ect were private? Recently the signs were reset? Removing the [ and ] and just making it say "Private".