Is putting frosted glass in the windows of public swimming pools:
1: A sensible idea: people are often deterred from participating in sport because they are self-conscious about their bodies.
2: Rather an odd idea: if you don't mind other swimmers seeing you in your swimming trunks, why would you be embarrassed if a passer-by happened to look in through the window.
3: An interesting example of how taboos and voyeurism work: it's inherently threatening to be looked at through a window, even if the other side of the window is a public place which anyone could enter.
4: An example of political correctness gone stark raving mad.