Reptile Boy - S2-E5
Corrected entry: The frat house is a place of residence. Angel should not be able to enter without an invitation.
Reptile Boy - S2-E5
Corrected entry: Why did the frat boys bother kidnapping a girl at least a week before the ceremony? They apparently don't care if the sacrifices are connected to each other and had no trouble attracting women to their frat house.
Correction: They only choose certain girls for Machida - although their criteria are never explicitly stated, the fact that Tom is desperate for Buffy to go suggests that they pick their victims carefully rather than just dragging in some random girl at the party. If they specifically wanted Callie for the sacrifice it would make sense to grab her the first chance they got, even if that meant holding her captive for a week.
Correction: The frat boys wouldn't own the frat house which seems to be a factor in deciding if a vampire can enter a residence. Sunday & her vampire followers could get into Buffys room when she was at the university without an invite.