Being able to weed out LLM responses is becoming more and more important for me when I hire for data entry and online research tasks from Upwork. Lots of the contractors on the platform now automatically submit a response to anything you post using some sort of LLM that takes your requirements and confidently asserts that it can complete the task. The AIs are pretty good at jumping through the traditional hoops that one used to put up to make sure someone was paying attention to the task!
As a stopgap, I've started requiring that applicants demonstrate proof of life through a simple question like 'what is the headline on the frontpage of the new york times today', since many LLMs can't live search yet.