I'm in agreement with you, BGK, and that's exactly my point. No two scenario's are alike. Without knowing Titan50's choice of fish species, and his water's drainage layout, who's to say that prohibiting fish escaping shouldn't be given more than a fleeting thought? A species that reproduces in your pond will probably replenish itself. Not so for HSB, as an example.
If his pond drains into a creek, and he stocks fish wich are not normally found in this creek, how does that come into play?
Too many unknown factors to make a snap decision here, me thinks.
