How to block PROPFIND (or any other method) on Apache
Use the Limit or LimitExcept directive. One example might be:
<Location />
<LimitExcept GET POST HEAD>
Order Allow,Deny
Deny from all
Satisfy all
</LimitExcept>
</Location>
Simpler. Limit just one method instead of trying your shot in the dark about what methods are really needed to except.
<Limit PROPFIND>
Order Deny,Allow
Deny from all
</Limit>