If you come to any online discussion with the expectation of negative comments from other participants, then chances are you will put any unintended comment out of context.
As blaydRnr said, it's a DISCUSSION forum, one shouldn't be surprised if a comment is made about the jeans because it's unusual.
Dion's "Might be time for a pair of waders now." doesn't mean he thinks any less of the guy. He probably, like me, thought the guy is pretty crazy for getting into that cold water to hold a fish (good for him, putting welfare of the fish ahead of himself). Most of us wouldn't do it, that's why we have waders, so he suggested... Not sure how one little comment turns him into a jealous beaker who is always out to make a smart comment...