We're trying out anubis.
If you briefly see a page showing a cartoon girl, before your page loads, that's our bot blocker at work. It challenges your browser to solve a math problem using javascript, which tends to be a problem for the dingbat bots.
Once that's done, your browser gets a cookie that lasts for several days, and you shouldn't see that screen again until the cookie expires / gets deleted or you switch devices.
As we speak I'm watching the number of "guest users" (mostly bots) drop by an order of magnitude. So I guess it's working.
Making sure you're not a bot!
Re: Making sure you're not a bot!
I have received one report of problems when trying to send PMs - getting that screen and then (sounds like) being sent back to an empty PM compose page. Has anyone else encountered this?