>I which case I would apologize, say it won't happen again, thank them for making the changes they said they would so it doesn't happen to someone else, and say I look forward to joining again in the next batch.

This sounds like a message you would say directly, not a public blog post. It sounds like Erik was kicked out before he could further communicate directly.

>Exactly, that's why I would post anything that could remotely be considered a criticism.

I don't think the he views RC as much of a career aid, more of something fun to help him improve as a programmer. Thus I don't think he sees it as important to attend in order to get a future job.