I found this rather interesting:
Japanese newswire reports from earlier this year state that as much as an estimated 10% of Japan's male youths are "hikikomori," people that have psychologically divorced themselves from society and social interaction. These young men literally live their lives in anime and video games, coming out of their bedrooms only occasionally for trips to the local convenience store for food. These young men, and other men who are intimidated by the opposite sex or feel betrayed or victimized by women, may secure a sense of fulfillment and validation by imaging themselves taking revenge on women. The overwhelming majority of these men are civil, law abiding citizens that would never intentionally harm another person. These men know that the fantasies they harbor are immoral and illegal. So watching a fantasy alter-ego exact punishment on women with impunity can be tremendously satisfying. - Animenation
I might be wrong but, I think we've found which japanese stereotype Kei belongs in.