I agree that it is a pain when you get it, but it should, in theory, only be rare to get it .... unless you behave like robot.
I only ever remember seeing it twice, but remember being utterly confused when I first saw it. I've never read any advice on what you have to do to avoid behaving like a robot, but I tend to double check everything before I click on a Google Captcha checkbox. Maybe that is the trick that sets up that human-like delay in clicking the button?
Volunteer Helper - but recommending that users move off the platform!
Once the admin for GregHelp now deleted.