I suggest that if you are concerned about what you say being associated with your identity than you should put forth the effort to conceal or make difficult/impossible to determine your identity and not require or expect others to do the work for you. Besides, if you already have said something that would affect you in some way, then regardless of the public logs, other privately established logs can be used and you will have no recourse.
I know very well how to hide my identity if I want to. I have several nicknames that I use on different forums/websites, depending on how anonymous I want to be on that forum/website. The thing is that if sometimes I can write silly things, some times (hopefully), I can also write smart things that I may be willing to be able to claim for paternity, in some future. That's why I like the rot13 function : it hides the original nick but it's easy to show what it is really, if we just let people know that it is a rot13-ed word.
Now, I don't exactly "request" you to do it, since I know very well that I have no power to coerce you to do it. I also know that some other program miht just be doing it without us even knowing it. I just think it might be some kind of courtesy. If you don't do it, it won't be the end of the word for me, I don't care that much.
It can be argued that a public log makes information finding easier, and yes, that's the point. Information wants to be free.
Masking the nicks of people is not exactly hiding information. What is important is what people say, not who actually said it and with which pseudonymous.
