Water and Lava buckets are a no from me.
As said above, this has been suggested probably a lot of times (feel free to use the search bar above)
Lava bucket - You can place it at your egg (would restrict some strategies like being a Ninja since damage sound)
Also make it really hard for the opponents to mine it just to get burnt. Lets not forget they still have to fend off the enemy.
As if campers are not annoying enough, now they can skybase with lava flowing down - as if they care about the rules (sadly not)
I'm sure there are many other reasons why players don't agree with this.
Water bucket - TNT probably won't be that effective.
It's a good suggestion though, keep them coming.