sudo ipset create no_prop
for i in $(wget -O - http://stat.ripe.net/data/announced-prefixes/data.yaml?resource=32934 | grep prefix\: | awk '{print $3}') | grep -v :: ; do sudo ipset add no_prop $i ; done
sudo iptables -I OUTPUT -m set --match-set no_prop dst -j REJECT
fascist #propaganda outfit no longer reachable 😉
(well for IPv4).. modify for IPv6 / nftables