Well those hand written signs have been ubiquitous for years.  I'm thinking more along the lines of what the NCAA invited when it pulled its tournament from North Carolina due to their House Bill 2. The NCAA got into the political correctness game.  They did so willingly, and perhaps they were right to do so.  That said, how can they condemn the one matter yet appear to support MSU by allowing their participation in the NCAA's Tournament?  With the finely tuned politically correct radars we have out on college campuses how can a team agree to step on the court against that program.  In a way it ratifies the behavior of MSU's program.   Now if you are say a team from the Ivy league.  You are a 15 seed facing MSU.  You know your tournament ends at the final buzzer.  You know that the only highlights for your program will be as the ones getting posterized.  You don't really need that.  Maybe you decide, instead, to make a stand, to look at the 2 seed and say you do not measure up to our standards.  Maybe you want that message to go out on Sports Center and every other news show.  Maybe that 100 million of publicity as an institution that stands for something seems like a good deal.
Who knows, before even the tournament  maybe some women's team in the Big10 decides their players are not safe on MSU's campus and therefore they cancel a game.  Maybe in solidarity the Men's team from that program agrees and also refuses. 
College kids are funny.  They can accept hypocrisy in sports programs more than just about anywhere, but traditionally colleges also like to do a bit of springtime protesting before finals.  Its a great American college campus tradition.  Maybe the fun of protesting will override the love of the tournament.  Maybe.  Maybe not.  The fact that schools are still welcoming MSU to their campuses suggests not.