Sabrina and Stephanie hated authority. They didn't like people telling them what they could and couldn't do.
These "new" Goths had almost become a sort of authority themselves, forcing others to become like them. Giving them no choice in the matter.
Sabrina and Stephanie were all for having more Goths around, but they would never force others to become like them. Not ever.
They searched the building for other "original" Goths to help them protect non-Goths from being changed against their will. And after nearly five minutes, they met up with Trevor Blake, Zoe Smith (Jon's younger sister), Athena Northwood (Zoe's friend), and Zelda Whitefield (Zoe's other friend).
Together they decided to go out and stop the "new" Goths from what they were doing. If they could do it, anyway.