Reminder that this warning in the SDK isn't a joke.
Midway throughout the prom it filled up for me and peoples shaders looked fucked.
You can check your own log in "AppData\LocalLow\VRChat\VRChat" and see if it filled up (e.g. "Maximum number (256) of shader keywords exceeded, keyword _COLOR_ON will be ignored.")
Consider using a shader that doesn't require keywords.

There is no reason why "PENETRATOR_ON" was a shader keyword on an avatar there.