The relevant policy is at
<http://en.wikipedia.org/wiki/Wikipedia:Blocking_policy#Disruption>, which
says in part:
"Sysops may, at their judgement, block IP addresses that disrupt the normal
functioning of Wikipedia. Such disruption is to be objectively defined by
specific policies, and may include changing other user's signed comments or
making deliberately misleading edits. Users should be warned that they are
violating policy before they are blocked."
And, BTW, the warning has now become a discussion. See:
<http://en.wikipedia.org/wiki/User_talk:Netoholic#Warning_re:_refactoring>
and
<http://en.wikipedia.org/wiki/User_talk:Netoholic#refactoring> for the
previous discussion that led up to this.
Thanks,
Brian (BCorr)
Phil Sandifer wrote
What portion of the blocking policy are you invoking in
this warning?
-Snowspinner