unblocking js: explain to users the risks involved
However, js is also extremely widespread and lots of site won't work well/at all without any js.
As such, many users will be tempted to enable js to see the whole site.
Gist of _hc's explanation on IRC:
if that info is transmitted in plain text, then lots of others can see it
also, anyone with whom that site is sharing data with, like analytics services, etc., can track you
and once you are tracked, you have basically no control over where that info goes