It's not rude of the developer, it's rude of the message in that context. I.e. it's rude of the computer, due to a non-rude oversight of the developer. But guess who doesn't know any different? Most people. Regardless, it's not bitching to describe that reality, and the problem is interesting.

In fact, nowadays, the tendency to overreact to overreactions is just as big a source of uncalled-for negativity as the ostensible first-hand complaining. I don't perceive any actual offense in the blog post, the way you're using the word, but I do perceive it in your post. I could be wrong on both counts, but that's my perception on reading.