My theory on the "stop stem cell research" underwear:
I don't think its just a gag or random Easter egg, I think its significant and fits the character.
From what I've seen of Deaf culture and people (capital D Deaf means culturally deaf, signers who identify with the community and its culture) some(many even) are vehemently opposed to cochlea implants, they see it as a tool of destruction of Deaf culture which has been forced upon many of them by doctors and audiologists in a vain attempt to 'cure' them, when they themselves don't see themselves as needing a cure, they are a linguistic minority not a bunch of disabled people. Stem cell research, with its promises of curing deafness is the next step and I've seen many Deaf people express concern about, or opposition to, stem cell research; their culture is under threat.
It may just be a coincidence, but for them to be worn by Shizune...
Is this the case or have i read far too much into it? Significant or an easter egg?
I must say, I'm impressed by the research and knowledge that went into writing the characters
