This is Hacker News, I think about workarounds and ways to hack "the system". The article talks about a pat on the shoulder to stealthily check for the Brahmin

This is Hacker News, I think about workarounds and ways to hack "the system". The article talks about a pat on the shoulder to stealthily check for the Brahmin white thread. What's to prevent someone from wearing a thread under their clothes? If you have a religious problem with it, wear a color other than white, people aren't seeing it.