Reenable Metacentrum network list update
Once upon a time there was an automatic update of the list of Meta networks into the GRID abuse group. It's gotten lost in the chasms of ages, however we might boldly draw it back to light.
List is accessible at https://mailman.metacentrum.cz/share/certs/hosts_list (use wget or curl, not browser, as it is too clever in SSL renegotiation).
In the history, the list was downloaded at ir.cesnet.cz and uploaded to oper@mentat-hub.cesnet.cz:iplist-grid. Mek, there must have been some script somewhere, which took this data and updated the group - so for start, please, try to search for this code, update then should be straightforward.