You'd wonder some times if trashy teen movies and mainstream schlock horror writers have taught us nothing about human behaviour.
When the telekenetically empowered nutter is made a fool of they don't just limit themselves to killing the perpetrators but indiscriminately lay waste to everyone in the room. Why? Because it is not so much the people behind the pig's blood that are the real offenders but those who were in on it and kept schtum. With friends like these who needs enemies. It kind of all boils down to trust. Can you trust those people? If in doubt, leave them out.
In truth, you tend to come to half expect such things from a transparent, androgyous leech who is so in need of validation that they probably have a photoshopped picture of themselves appearing on amihotornot. A person more choirboy than diva. Badly written though those people may be they still exist.