I tried to find the pools you mentioned above, and for ckpool & kano pool the browser did not want to go there saying that they have malware.
Kano pool is a small pool that doesn't find blocks way too often and thus you will likely have to wait for way too long to get paid, in theory, eventually, the payout should be higher than the other pools since it has the lowest fees, I personally don't like to bear such variance, but to each his own idea.
@op They say they have malware because they are associated with or have downloads of cgminer on them and some web filters eroneously consider any site with miner software downloads is a trojan/virus/compromised site.
With regards to small pools, of course the variance is directly related to the hashrate of the pool, so the more people mine there the less the variance affects the outcome.
Some people are super sensitive to variance, even on large pools, they jump ship when there is a run of bad luck.
Using these smaller pools and boosting their hashrate may be a good way of getting around the larger pools becoming more and more restrictive with sign-up requirements and lack of anonymity.