It seems to me that it is one thing to save a seat or even a row, and other thing entirely to save multiple rows. Still it is not against Southwest’s rules. I’m not sure how a passenger trying to save a row behind them would block a passenger from sitting there, but social custom seems to make it a plausible strategy.
Is saving multiple rows of seats going overboard? Would you honor someone’s claim that they’re saving seats in a row they aren’t physically in?