The Chrome extension angle is interesting here. We ship an extension that interacts with Gmail and have seen how much variance there is in what Google considers

The Chrome extension angle is interesting here. We ship an extension that interacts with Gmail and have seen how much variance there is in what Google considers "bot-like" behavior from extensions vs. the browser tab. The line between "automated" and "assisted" is not well defined at the API level, which ends up being a similar underlying problem: distinguishing intent rather than pattern.