You do realise this had a very, very specific, useful and actually necessary purpose, though? Like, proving there was no pre-mine?
I'm not sure it's a good idea to store data on the blockchain by putting it into the UTXO set.
Using your numbers, Ripple and Greenpeace with their $5M anti-Bitcoin budget could have increased the UTXO set size to over 500GB over the course of roughly a year.
I understand that even if you don't put a tool out there that easily allows people to bloat like this, they can code it themselves. But it's still a pretty considerable attack vector if we see how much money is splurged on anti-Bitcoin campaigns these days.