The UC Santa Cruz "grout" phenomena - over 25 years of graffiti about grout on grout

I was surprised to find that this subject didn't have it's own group, let alone a piddling discussion.   But, progress takes time.  

I'm interested in 3 (three) aspects of Grout Graffiti -

Humourousness

Penmanship (or penwomanship)

Knowledge and/or experience of grout, tile work, various grout products available commercially and institutionally (especially secret advanced grout technology of the military),  plumbing