Well, I am for now.
I noticed Baidu pretty much on a forum of mine 24/7, but I didn’t recall ever seeing them show up in the referrer logs. Over the past year, across the sites on my server, they’ve made almost 35,000 requests for pages; chewed up 337 megs of bandwidth, admittedly not a big amount; and sent 1 referral. And the forum I first noticed it on only has the home page indexed. So since it doesn’t seem to be doing anything for my English language sites, it’s going to start getting blocked. Maybe I’ll change my mind down the road.