well first off that would be pretty damn useful if it 'highlighted' the event target brick with the ghost brick
alternately, use a sort of aimbot mechanism to lock onto the target brick, and maybe some mechanism to check if there's a brick in the way - then just automatically fire the wrench and paste the events in when you get close
This still wouldn't entirely work:
1. Named bricks. Bricks would have to all be named before they could be evented.
2. Pathfinding. Now instead of just standing there and flinging a bunch of bricks up, your character now has to move through half-loaded builds, or fully loaded ones, to try and find it's way to a certain brick, that is, if it can even be reached.
3.
from what it sounds like, buildbot only knows positions relative to where the ghost brick is/started from, and has no idea where the player is in relation to that
It doesn't even know where the ghost brick is either. It just knows where all the bricks are relative to where the ghost brick started. (e.g. 37 5 15.6 from starting point, need to move to 35 5 15.6, shift brick -2 0 0)