I wouldn't say holding up a newspaper that says "No. 1" is the same as the way some Saints fans were treated in Chicago.
I would hope that the LSU fans would "seek a higher level", but without being there for the whole game, I really can't say what they did was out of line. As noted earlier, the OSU fans may have been really giving it to them at 10-0. If you give it, you better be able to take it.