Thanks for the great feedback! We have presented this internally to both the Identity and Webhooks team and they doing more investigation to determine feasibility.
An error occurred while saving the commentXuluniX commented
In my case, i had to deal with a total of about 40k bots on one channel.
For a good amount of them, the creation date of the accounts was in one of a few ranges.
However, the accounts were up to multiple weeks old before they followed and spammed a specific channel.
So yes, a "new-account" flag on the API doesn't help much, we need the date