Putting my admin hat on for a moment... rangeblocks are fairly rare for the reason you cite. But when used they are deployed in situations where a vandal has be

Putting my admin hat on for a moment... rangeblocks are fairly rare for the reason you cite. But when used they are deployed in situations where a vandal has been noted to be using IP addresses from the same range. Although you seem skeptical it often works! As these are not the smartest cookies in the crumble. Unfortunately, the only way to fix your problem is to create an account on another IP address and log in (or alternately ask someone to create it for you, a service Wikipedia can provide). Because the talk page includes links to templates WP thinks I'm entering external links and asks me to enter capchas. That's rather odd, I've never come across that before! I thought internal Wikipedia links were excluded from that filter. I will raise that when I find someone who is responsible for such things :)