It appears that someone launched a limited form of this attack using the address 3G83ox5zw7D6eySoSMCervh9cbhMXdA5t9.  The address corresponds to the script:


The script is spent by push 0 in the sigScript.

The attacker only generated 960 such outputs, which corresponds to 14400 sigOps, which is not enough even to fill a block.  Furthermore the fee rate for the transactions was not very high (37sat/byte), meaning that most normal traffic would be unaffected anyway.  So overall this attack had no affect.  Maybe this was a test?