WorldGuard VS MinecraftForge

Few different ways you could do this you could use WorldGuard and create a region that disallows interactions and then add yourself as a member. This would proably be of the most complicated solutions.

For admin managed maybe worldguard https://enginehub.org/worldguard

World Guard might work. You can define a region and enable flags to prevent things like block breaking, trampling, etc

https://github.com/EngineHub/WorldGuard (You may have to build it yourself if CB1185 isn't for Beta 1.7.3 ... I think it was)

Squirrel: https://github.com/MinecraftForge/MinecraftForge/blob/1.20.x/fmlearlydisplay/src/main/resources/squirrel.png

I found this. Give it a good read. It's kind of old but there might be some kind of help in there. https://github.com/MinecraftForge/MinecraftForge/issues/7558

it crashed bcz of Error java.lang.reflect.InvocationTargetException, probably mods. Also there is Duplicate key exeption, i dont know what caused it - there is a guys on github which had the same issue, try asking for their help: https://github.com/MinecraftForge/MinecraftForge/issues/5556

Does this happen in newly created worlds? Forge had an issue that was patched that caused the removal of dimension mods to break worlds. However it should be working in forge post v43.1.

I looked in LivingEntity and it looked to me like water movement physics are still hardcoded to affect all non-lava fluids in the travel function. https://github.com/MinecraftForge/MinecraftForge/issues/8608 is listed in the fluid API commit as the go-to source for info and it mentions a "fluid motion" setting but I don't see it. I get the feeling the documentation is outdated but that's literally the only documentation I can find anywhere about this api. Very frustrating.

According to this PR, it's been fixed but it's still present in 43.2.2.