On [http://en.wikipedia.org/wiki/Special:Blockip], a list of IP ranges is given
where blocks should not last more than 15 minutes, because these ranges contain
rotating proxies that may lock out many more users than the original blockee.
Manual enforcement of this constraint has shown to be ineffective. Legitimate
users are getting blocked on a daily basis by careless admins who slap lengthy
(or even indefinite) blocks on people without checking, no matter how bold and
obnoxious the warnings are.
This restriction ought to be implemented in software, similar to the spam black
list, where admins could specify upper limits for block times per IP range. A
simple two-column text file would do. The software could then display a big fat
warning and require another confirmation before allowing any block that exceeds