I am using Webform on Drupal 8; I have a few spambots that fill out the exact same form in the same way every day.
I want to do some kind of validation that automatically blocks these postings. For example, if the name given is "Spambot 1", I want to discard the webform submission automatically.
Drupal 7 has the Webform Validation module but this has not yet been ported to Drupal 8.
I found a code snippet on adding custom validation to a webform element, but this seems to be for providing helpful errors to allow the user to re-submit the webform, whereas I want to make it seem like the form was submitted but silently discard the submission.