XM,  You nailed it.  Use anything as an excuse to post what one wants, whether related, closely related, or not even related.  Additionally, don't address the point or thought.  I used to think this was due to reading too fast, not understanding what was written, or the poster not being clear in his/her writing.  But after the last three days, I have learned that more often than not, it is maliciousness, intellectual dishonesty and/or disability, and one wanting to hear oneself "speak".