So? Just close those reports then. I thought the issue here is to filter out anything spammy while not loosing any potentially valuable reports. A human should be able to filter out at least 90% of the spammy stuff while not loosing any good ones, thus significantly reducing the workload of engineers in higher pay grades.

Google sometimes give me the impression they want to absolutely only hire the best engineers, but I'd argue that many non automatable tasks can be done more efficiently by having some reasonably trained lower rank staff. See also all the complaints about missing service when trying to use Google products commercially - if they do want to seriously enter that market, this stuff needs to change significantly.

Other things that come to mind: Automated Youtube takedowns and Gmail account blocks. Do you really want to save those few million bucks a year for not hiring support staff, then have lots of disgruntled users blogging about how evil you are and then pouring those millions into PR campaigns?