XF 1.5 Increased contact form spam

[TheLaw]

Has anyone seen an increase in the amount of contact form spam? Normally changing the challenge question works. But I'm getting hit daily with ridiculous contact spam and in various languages. I get hints of what some of these spammers are using along with "test" posts, including xrumer. It's a complete waste of time for everyone and wondering what some of you're doing to prevent it, along with allowing guest posts, which also have been rendered impossible by nonsense even with captchas.

I'm also not seeing the IP address in email. Wondering whether this is standard (as I thought it was from Mike's comments) or there is a toggle option.