&gt; I don&#x27;t understand why advocate against it, which people are actually doing in this thread.<p>Because cycle helmets cost money which could be better spent on just about anything.  Because they reduce the number of cyclists (which is the worst possible thing to do if one wants to make cycling safer).  Because they look stupid.  Because forcing people to wear them is flat-out illiberal and hence wrong.<p>&gt;  It&#x27;s like advocating against the seat belt.<p>I wear my seat belt, but I advocate against seat belt laws.<p>&gt; Is it really terrible that people have to wear a helmet?<p>Yes.<p>&gt; I&#x27;m not shedding any tears over people who claim they will stop biking because helmets ruin their hair. It&#x27;s simply a basic preservation of health.<p>Do you wear a walking helmet and a driving helmet too? Have you installed non-skid in your bathtub? Statistically, those measures are more effective than a cycling helmet.