Yes, there are risks but the great thing about a glass trap is you can see what you have. I thin most guys can tell the difference between a shiner and just about anything else. And you can make a good haul in an afternoon, at least when the river is down (won't see that for a few weeks down there now). I've seined my fair share of creeks in SE OH and I'll agree with you there. You get all kinds of stuff in a seine. Frankly, you can get hitchhikers from the hatcheries too. They just seine out their ponds the day before the truck hits your hometown. Granted they test for parasites and other nasties. But I'm not convinced they are totally risk free.