My buddy's friend of a friend's pic in this article.
Shad in the Cedar
"We have received several reports this week of anglers catching non-native American shad in the Cedar River near Renton,” said WDFW spokesman Chase Gunnell"
I'm not worried about shad eating salmon fry. Bass and trout eat WAY more. And there isn't any evidence of shad pushing trout or salmon off redds. I think shad will fertilize the river in a good way. I think they feed a lot of sea lions that might otherwise eat steelhead & salmon.
The thing I worry about is the mob. All the bucket toters will descend on the Cedar with multiple barbed jigs. Sure, they might end up catching some trout, but even worse, just the mere mob scene will take away from the trout experience.