[dragonmantank]

Same here. One of my clients uses it for all of his sites, and we have all sorts of problems with it. For a while it was flagging my Linux and Mac PCs as sending viruses/spamming cloudflare sites. They couldn't provide me any logs though.

Honestly, I hate them.

[GVRV]

Same here, it always thinks me or someone on my network has a virus and asks me to enter a re-captcha before "granting access" to the site. I have no clue why it thinks that!

[dragonmantank]

I wonder if it's related to odd traffic spikes: http://news.ycombinator.com/item?id=3856364

I usually get flagged when following popular links from Twitter. I just find it highly annoying their support doesn't care. When this happens, I just get told to wait 72 hours or whatever and go back to the site. I wonder how many users sites lose because of that.