Originally Posted by
IAH-OIL-TRASH
... It would be nice if UA would do frequent record checks automatically to sweep such passengers out of their seats (to random middle seats in back) to free up more seat selections for those who actually deserve them.
Although that would mess with companion guesting with on separate tickets - a nice elite benefit when one can not book their companions on the same PNR. This abuse practice does happen but I have no reason to believe it is significant enough to take away off-pnr guesting.