Mob Creepiness

Hi so im working on an 'enhanced survival' server and would like someone to make me a plugin which can do the following(This is well out of my java depth)

Creepers: They sneak up behind the player hiding behind anything possible
Spiders: Spiders can make cobwebs in players houses whilst the players arent there(E.G player goes mining spiders are around the house they will go and block the door with cobwebs)

No commands needed ​

 

Not really sure if this is possible

 

It is not possible in bukkit, but as a mod it might work.

 

@Phishy @_Die
Of course these things are possible using Bukkit.
The only question is about the Performance Impact with that AI.

 

How can a house be defined?

 

User placed blocks containing a door

 

@ChipDev Idk but villagers reproduce on the number of valid doors aka 'houses', maybe use whatever code that is.

 

Or... you just add meta data to player placed doors

 

Even without plugins like this I get jumpscared ,_,