Like I said, some folks are comfortable running lines in current some aren't. If you aren't, then yes, its a good idea to stay out of it.
And for the record, no, I don't attach my lines to a buoy. Mine aren't designed to be deployed that way. However, many times I have sunk my lead (le-ed) weight yards away from a buoy and use the buoy as a secondary marker.
PP, if you've never seen someone running lines in the middle of the river, then A) you haven't fished the river very much, or B) you're not out earlier or late enough to see them do it. 90% of the time my commercial lines were set in the channel or adjacent to it. And, FYI, several of the state record bluecat have been caught near the center of the channel.
But, back to my original point. I see no reason to call someone an idiot or moron for not knowing about that law. Its seldom ever talked about and dang dear impossible to find in any reg books. I equate that to the same as someone not knowing about the law that states you cannot sit on the top part of the upright section of your boat seat while in motion, which I see done all the time before people come up on plane or while trailering their boat.
slabho
Never kick a fresh turd on a hot day