Haha, taking advantage, taking advantage! Mmm, okay, no sleeping over or having coloured blanks sleep over in each other's dorms. I'm not actually a coloured blank! But don't be so casual about it if you don't know or I'll taze you just for being dumb. Basically, no spending the night in other dorms. Your home is your home! Or else.
No punching walls. No going to the Pillar without Ophiuchus, or... right now, at all.
Annnnd the main one is no uneven trades! Don't give gifts, don't accept gifts. Make sure everything has equal value.