Meph was a member here years ago (right at the time Sabermetrics was gaining popularity) who always acted like he was the smartest person in the room. He had very big (and often very wrong) opinions, always backed up by his misunderstanding of advanced statistics. He famously predicted that Khalil Greene was going to be the next Alex Rodriguez.
Kyle.....where to start. Smart dude, but was such a mixture of pretentious and weird that everything he posted was completely off putting.