Notch should implement the option to turn off creeper explosions
damaging the blocks in Multiplayer.
The experience of danger is nice, but randomly destroying the
creations is not fun in a large multiplayer realm.

Some small recent games of mine:
Griefer 4k http://damocles11.byethost9.com/griefer4k.html
Kobold 4k http://damocles11.byethost9.com/kobold.html
Cave 4k http://damocles11.byethost9.com/cave4k.html