They can do it even if it's not that easy.
Come on, people. You say it in public, it's public.
Please don't argue that the feds recording everything uttered in the cb is like if they had hidden microphones in the local bar. It's actually like you and your buddies having a very loud conversation in a recording studio. You know the risks when you speak. You've had plenty of forewarning.
That being said -- I was comfortable with the 1-hour limit. I could be comfortable with 4-6 hours. 24 hours seems excessive to me.