Say, hypothetically, I had someone trapped in an inescapable cage of warded blocks. Say also that I had removed their items and armor before transporting them there. They would eventually starve to death though. Could I prevent this by force feeding them in some way?
Minecraft – Force Feed someone
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Related Solutions
Unfortunately on a server where there are no rules against griefing and everything is destroyable, there is no foolproof way to "trap" enemy players.
- Any redstone contraption can easily be avoided, as it requires stepping on a pressure plate which can be seen by anyone looking for them.
Traps in pitch black can easily be avoided by small investments in torches by an opposing player.
Any wall can be tunneled through.
Aside from triggering redstone traps, the environment won't "update" in response to a player, thus any crafty player can avoid all traps with a little resources.
The best way to keep your stuff secure is to hide it. The best way to do this is to use a servers /home and /sethome commands. Simply go deep into the wilderness. Dig deep into the ground and ideally try to find a naturally occurring lava source. Replace the blocks above you and put your chest inside the lava source and /sethome. Even players using x-ray tools will only see the natural lava source (torches are a dead giveaway of a base) and won't be able to see the chest.
TL;DR: Bases can not be secure, and hiding is difficult from x-raying players. Put a chest in lava and walk away.
This setup works:
One of your items is an arrow, the other is any non-dispensing item like redstone.
Arrows will fire and miss the tripwire. Items will hit it then burn up, triggering a signal. You can use the items you suggested: arrow, cobble, cobble, arrow and the desired signal will be generated (well, the inverse).
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Best Answer
You could place a beacon nearby that would give them a regeneration buff. Starvation causes a loss of 1 point every 4 seconds, while a level 1 regeneration buff gives 1 point every 25 ticks (or 1.25 seconds), so you should be able to keep them at full health even when their hunger bar is empty.