People who get easily offended over non-issues but need to be part of a group so they get loud and verbally abusive about someting but in their heart they could really care less..

A phrase to describe someone who is cognitively degenerating. Synonym of "going off the deep end". Can have varying degrees of severity.

Reference to the song "Hey You" by Pink Floyd. The line "and the worms ate into his brain" makes no sense in an otherwise linear and literal narration throughout the lyrics.