I think it's worth pointing out at least that 1) Sabelnikov was never found guilty of any wrong doing and Microsoft agreed that it was not him who ran the botnet. 2) Even if CZ was part of the original CryptoNote team, there's no indication that he was involved with Bytecoin at all. Not only that, but if he was involved with CryptoNote, the act of creating BBR(with the new PoW) alone by himself would be strong statement that he disagreed with what Bytecoin did and wanted no part in any sort of scam.
Personally, I don't think it's likely CZ is a bad actor. Whoever he is. At worst it appears he could be a famous hacker responsible for writing some code that other people used in a malicious way(the botnet). I'm not going to defend that if that happened. But we don't know anything about that what happened in that situation and there's a whole range of possibilities, including being coerced in to writing code. We will likely never have sufficient information to make any sort of judgment either way.
So there is some risk with an anonymous developer, that is a constant. On the other hand with BBR you also seem to get someone who is an expert at dealing with what is becoming apparent is a very shaky code base. So there is some trade off there. I'm not making the argument that BBR is less risky with a single developer than XMR is with 7 or 8. But I do hope that anyone considering the situation will at least take the time to make a fair evaluation of CZ on what he's done so far.
edit: and that's not meant as a reply to aminorex specially since I know he knows all of this already, but anyone who is just looking in to this crazy CN world in general.
The evidence seems to point to CryptoNote and Bytecoin as part of the same scheme but were made to appear independent. (Note: the CryptoNote technology itself is impressive, but their ethics are apparent not)
The line of thinking is, in order to carry out the scam, Bytecoin was created and chosen to take the fall so that in the event that the whole thing crashed and burned (and it did), there would be separation between CryptoNote and Bytecoin. Thus Bytecoin can be seen as a malicious off-branch that independently developed the coin and the massive scam, but CryptoNote is the innocent provider of technology and watched on the sidelines as its brilliant technology was misused. But people were not convinced by either the Bytecoin scam or the CryptoNote independence.
Now not accusing BBR as a off-branch of the CN/BCN scam and coming for the same family but let's say that Zoidberg was involved in CryptoNote, why would his involvement, even if BBR does not look "scammy" be of concern?
Because that's how the scam was originally suppose to work. Create a scam hoping that it would work (Bytecoin), but when it failed, create a new "clean" coin to replace it (Bitmonero), while maintaining clean hands (CryptoNote independence).
But the community didn't buy that, and Monero was the result. BBR would be like Bitmonero, a "clean" coin designed to be "fair" after the scam but was controlled by the original "scammers".