This plugin that I made over a few days adds the ability for you to throw bricks at glass, or even mobs, and people that might have beef with you ;D

It automatically hooks into Lands and WorldGuard, allowing administrators and land owners to prevent people from messing their protected areas up with bricks.

WorldGuard stuff:

Check the bricks-can-break-glass flag on all relevant regions, by default as of now it is set to true, if not defined by the user.

Lands stuff:

Bricks don't break glass in a land claim, if the block-break flag is disabled in the relevant lands.

Config stuff:

Several values can be customised under ThrowableBricks/config.yml

damageFromBrick: Damage when an entity is hit by a brick.

defaultPickupDelay: How long in ticks until the brick can be picked up again.

minTicksLived: How many ticks need to pass before the brick can hurt entities.

checkDistance: The distance to check for any available entities to damage.

cooldown: How long until a brick can the thrown again.

Demonstrated on my YouTube channel:

https://www.youtube.com/watch?v=rEwW0F-VKyk

https://www.youtube.com/watch?v=iTk7DX1PeXo