Frats should have an option of the Frat President being able to delete frat members from frats. Trying to make a strong frat, you need to get rid of multis and people only in it to have fellow frat members support them.
Or a nomination option. The Frat President can nominate frat members for elimination from the frat and you need 50% + 1 of the frat members to vote the person out.
It would really help frats to become stronger and more loyal.