I posted in a thread, and later I got an email notification that someone else posted in that thread too when I opened this guy or these guys are discussing, I felt something is going on there as seeing their similar activity, when I opened their last post, they were involved in a similar trend in other threads too, where someone makes a comment first and then the other guy quotes the first one and make a reply and this goes on. I see their last 20 posts where they have followed a similar trend.