I haven't banned anyone for greifing on the server in a while, let alone someone who is staff, to make it worse ... I warned you the last time doing this sorta of stuff, when it was you and seaofpain messing around and then 'forgetting' it.
On purpose forgetting or not, its the 2nd warning now.. No one is overreacting, you made the mess, the mess was left for someone else to fix, then you don't bother coming on to explain and apologize for days.
What do you expect to happen, everyone to forget? Belittling other players buildings/projects via greifing with water or lava or anything else especially a mess that needs fixing, ain't cool with me, don't do it again, its the last warning if you even care.