There are two very important things to know before commenting.
First, please remember the statement on my about page: This is my personal blog, not an official Google blog. Please stay on-topic. Don’t post feature requests, comments or complaints about Google+ on posts which aren’t about Google+; I’ll delete them and consider you a spammer henceforth. Instead, go over to Google+, in one of the many posts where I or someone else from Google is talking about related things in the product, and talk to me there. Or if what you have is feedback, use the “Send Feedback” link at the bottom right of each Google+ page: that’s much more likely to lead somewhere than injecting a random comment into a thread.
Second, this blog does not shy away from contentious areas of religion and politics — in fact, it tends to plunge straight for them. The people reading here vary across the entire spectrum; from the far left to the far right (of several different countries), from clergy to militant atheists. Part of the purpose of this blog is for people from all of these sides to come together and find out what each other think about these issues, and engage with them on hard questions.
With that in mind, the basic rules of engagement are those of civility. The usual stuff: Do not troll; do not flame; don’t engage in ad hominem attacks; treat the other people on this blog with respect. Remember that this is a fairly smart audience, and you’ll get much further at convincing people with well-thought-out arguments than with rants.
Avoid losing your temper. Yes, I know this can be difficult; but do it anyway, or if you must lose it, do it elsewhere. It’s hard to discuss these issues when people are yelling. If people start to lose their tempers, I will ask them to cool off.
And finally, I reserve the right to maintain this environment with all the tools at a blogmaster’s usual disposal — mercilessly closing threads, deleting comments, and banning people as needed. It’s rarely needed; let’s keep it that way.