One of the best sources for information on the internet is the Usenet Newsgroups. For information on bicycling, there are (n) groups covering various aspects of bicycles an cycling.

The issues of whether or not to wear a helmet, or whether or not helmet use should be mandatory have a very long history on rec.bicycles.* and other related internet fora. Everything that could possibly be said on these topics has already been said, but some posters never tire of flaming away in The Great Helmet War (I could not even find an archive here but try http://www.bhsi.org/negativs.htm. - Harriet) The newsgroup rec.bicyces.soc is the only appropriate place for this topic, where those who like that sort of thing can blast back and forth at one another the same old tired arguments. In all of the other newsgroups (and mailing lists) it is extremely bad form to raise this issue, most long-time users have heard this all before and are sick of it.