Have you created alternate accounts to post questionable responses?
reduxredacted: No based on how the question was framed.  If a response is "questionable" then I have to question whether or not I should make that questionable response.Most of the time I post under my real name (actually, I don't know why I'm using a pseudonym on HN, frankly, just reflex when I first joined).The exceptions are:
Discussions on Politics or Religion.
I don't want my name associated with any religious (or atheist) group nor do I want it associated with any particular political party.
I have worked for people that once they discovered my political views, I was treated differently because we either agreed or disagreed.
I know that my name is going to be googled the next time I apply for a job and could run into someone who will toss out my resume simply because I'm conservative, liberal or other.If a site is overly political, or it's associated with a political cause, I will always keep only one ID on that site.  If the site allows anonymous posting, I'll use my real name and post anonymously when broaching a subject that is controversial.  If the site does not allow anonymous posting, I'll keep two IDs handy for when I want to join into discussions that would identify my political or (non/religious) affiliation.