User blog comment:B214/Kuoh Academy students finding out that Issei stays with the ORC girls and is dating Rias./@comment-24468758-20140128092530

I think point 1 is already in action, as often seen with M&M as well as with Saji occasionally.

Point 3 is in action through point 4.

Issei's reputation with girls was already bad at the beginning, but by now it's far worse mainly because of point 4 as seen when Issei went to look how Ravel was doing on her first day in Kuou Acedemy.