Tigase has support for XEP-0128: Service Discovery Extensions for providing additional information to the server and component discovery information. One of the important usages for this feature is XEP-0157: Contact Addresses for XMPP Services which describes usage of this feature for providing contact information to server administrators or abuse response team.
To set abuse contact details you should set disco-extensions in property in etc/config.tdsl file with subproperty abuse-addresses set to your abuse address URI (for email you need to prefix it with mailto: and for XMPP address you need to prefix it with xmpp):
'disco-extensions' = {
'abuse-addresses' = [ 'mailto:abuse@localhost', 'xmpp:abuse@localhost' ]
}