As primarily a LMB fisherman, green sunny's are not all that bad, risky yes as far as pond management but here is my thinking. I have fished a private lake here in NE is where green sunny's are the dominat forage fish. You would not beleive WR's on the LMB in this lake. It was common to catch 17-18" LMBs that were over 5lbs., basically the GS keep the LMB reproduction to a minumum, without a lot of competition the remaining LMB grew fast and large eating 5-6" GS. This lake stayed this way for a number of years until an aquatic weed invasion that through everything out of whack. GS would not be my first choice to stock but I think could live with them if I had too as a forage fish for LMB based on the WR's I have seen out of this lake.