If they aren't scented they should be ok. If a trout thinks it's food it will swallow it. If they get fooled into taking lures, flies etc they will try to spit it out and it will get caught on the lip.
Compared to other fish like bass, trout are not very tough. It doesn't take a whole lot to kill them. Even if they swim away after being caught they can and do die if not handled right.