Poor Marie, getting a little thump again just because she misspoke.
And that's an example of how the misunderstandings start, how people get their feelings hurt or their knickers in a twist. To paraphrase dogmatic, this can be a difficult medium of communication. When you can't see the facial expression, the body language or hear the intonation, it can be very difficult to tell how a post is to be received. Posts can be misinterpreted and then the responses can start to heat up.
The thing to remember is, that most often, our words are here forever. So don't say anything that you will be embarrassed or ashamed about when cooler heads prevail.
My mother taught me long before the internet, that the written word can hurt people for much longer than the spoken. And here, that would appear to apply equally to both the writer and the reader.