I run a Openfire network, with SparkWeb as a client. Some of my users have discovered (and are exploiting!) a buffer overflow vulnerability in SparkWeb which allows them to terminate the connections of all SparkWeb users by changing their statuses to, and I quote, ``10e+8 questionmarks''.
Nonetheless, it's extremely irritating for users and my admin team, and I'd like to be able to stop this. We can't easily selectively ban users, unless someone wants to construct the LDAP query strings for that...