Carp question

[justin1982]

Yesterday I was at a good bass lake I've been fishing. A guy and his wife were walking and asked me if I caught anything. I told him I've done well with bass and my buddy caught 2 carp. He asked me if I threw the carp back and I said yes. He told me the next time we catch carp to keep them because the town's environmental department doesn't want carp in this lake because they stir up the bottom and destroy habitat for the bass. Is this true? I've never heard of this before...