I've actually written a complete thread about this in the past:
https://bitcointalk.org/index.php?topic=5247838please read and educate yourself before you push anybody towards cloudflare in the future... Cloudflare is fine for any service that isn't privacy-focussed... But not if you think your clients don't want their details in an FBI/CIA/DOD/... database. I, for one, wouldn't care if the FBI knew i was buying new lightbulbs, so a lightbulbstore could use cloudflare.
On the other hand, i WOULD mind if the FBI knew i was mixing coins, or buying a subscription to a porn site, or if i bought a new hunting knife. So if one of these businesses would use cloudflare, i wouldn't touch them with a 20 foot pole.
I have some question regarding this paranoia about Cloudflare. If you suspect Cloudflare for monitoring a mixer and leaking data to FBI/CIA/DOD, why would not you suspect the web hosting companies for the same?
For example, it is no secret that Anonymixer.com is hosted on Hostkey.com and Chipmixer.com is hosted by Choopa.com. So, how difficult is it for FBI/CIA/DOD to get data from these web hosts, if they can do the same for Cloudflare?