Oh yeah fish and game agencies have been some of the biggest violators when it comes to introducing exotic species. Now the pendulum seems to be swinging in the opposite direction with a big push to reestablish native species. This in some cases where naturalized species that have been in watersheds for decades and provide a fishery where no other viable one would exist, the naturalized species are prohibited and eradicated.
The common carp was introduced by the federal government.
The other carps including the bighead carp were given the green light for reasearch before they escaped into pubic waters. The Illinois DNR was going to sue Malone and Sons fisheries of Lonoke Arkansas for allowing one of those carp species into their state until the owner of Malone and Sons produced bills of sales showing their own DNR has purchased them for research years ago. Oops! (I know this because I am involved in aquaculture and an privy to first hand accounts. I could tell you some crazy stuff the government has done.) For the most part I support our wildlife agencies, have worked for one, and have friends there, but have run into double standards which is frustrating.
The biggest polluter in this country is actually the government especially the military.
My state was all giddy about reintroducing otters. Now they are a nusisance and you can get a permit to remove them. If you have a pond anywhere near a river system they can wipe your pond out. A friend in Illinois had $30,000 worth of largemouth bass wiped out on his farm by otters. When he complained and wanted to get permission to control them they told him it wasn't their problem and if he did any harm to them he would regret it.