So?
I wouldn't mind fishing for Northern Snakehead in PA, but wouldn't argue about it if someone was throwing them on the bank.
I can agree they are invasive though, same as browns. Should we throw brownies on the bank too ?
Sure. why not.;-)
The smokies aside, there's no denying that wild bows are much sought after by anglers in the northeast due to their rarity.
Sought after because they taste better, too.
All kidding aside... IMO Big Spring should be managed for Brook Trout. You wanna talk rare... It would be the only major limestone spring creek in PA managed for Brook Trout when at one time brook trout dominated ALL of them. And you are worried about loosing one invasive fishery when there are many. That said, I would not selectively harvest Rainbow or Brown trout from there without the direction of the management agency in charge.