Such is the nature of BGP. Something like SPF (eg: an authorized AS list for an IP block) and DMARC (reporting about who tried to broadcast what IP block and was rejected) would be great, perhaps even have the latter component convey attack info so ISPs could deal with infected clients automatically.
Basic security mechanisms when it comes to large ISP networks are a pipe dream though, instead we get vendors pushing extremely vulnerable Juniper gear cause its reasonably priced, meanwhile these boxes have new root exploits found multiple times a year. None of the vendors give a crap about security, Cisco pays it some lip service (to win gov't contracts) but charges a premium for basic features.
Basic security mechanisms when it comes to large ISP networks are a pipe dream though, instead we get vendors pushing extremely vulnerable Juniper gear cause its reasonably priced, meanwhile these boxes have new root exploits found multiple times a year. None of the vendors give a crap about security, Cisco pays it some lip service (to win gov't contracts) but charges a premium for basic features.