By the same logic people should probably not do SOBO's since they won't get to meet as many people and have such meaningful conversations with them, but this of course is not true. HYOH and enjoy what you want. Some people want to chat with everyone they come across. Others rather camp in solitude away from others to ensure they get the quiet that they want.
As for peeing on the trail; that's hardly close to LNT and not cool. If you want to keep walking parallel to the trail while 200 feet away and do it that's one thing, but I don't think that's what he was talking about