Shamless self-promotion, but discussion worthy nonetheless.
http://www.youtube.com/watch?v=gAH5w6XzUjU
Tried everything I could to stop and MPK 'em, but they're standing right out of range of the treant in the back (he deaggros if you try and move him close).
Reported them 3 times in the last couple days and nothing. This is on Excalibur.