If Flock truly believed that the domain name infringes on their trademark, they would file an ICANN UDRP complaint instead of Cloudflare and Hetzner abuse reports. But they don't, because the former would require them to perjure themselves, and the latter just requires them to lie to a hosting company.
Doesn't stop anyone with DMCA... DMCA is coming up on almost three decades of being a law, and requires statements made under penalty of perjury.
However many millions (likely billions) of DMCA takedowns issued, who knows how many false/bad faith... I wonder how many have led to prosecutions for perjury, even when filing tens of thousands, en masse...
No need to wonder, the answer is simple. Starts with a "Z" and ends in "ero".