Just realized that the email address shown in the Status section of each
SRFI is already a candidate for the eponymous class. It's been done
using unstyled <code> and <a> elements so far:

<code><a href=
   "mailto:srfi+minus+169+at+srfi+dotschemers+dot+org">xxxxxx@<span
class="antispam">nospam</span>srfi.schemers.org</a></code>

May be a lot of effort to change all SRFIs now.