Is it a LessWrongian faux pas to comment only to agree with someone? Here's the context:

That's the kind of person that goes on to join LW and tell you. There are also people who read a sequence post or two because they followed a link from somewhere, weren't shocked at all, maybe learned something, and left. In fact I'd expect they're the vast majority.

I was going to say that I agree and that I had not considered my observation as an effect of survivorship bias.

I guess I thought it might be useful to explicitly relate what he said to a bias. Maybe that's just stating the obvious here? Maybe I should do it anyway because it might help someone?

I'd also like to know about this in less specific contexts.