The user titles thread says:
Originally Posted by Roland
These titles are there for fun only and post counts mean nothing here. Don't treat anyone any differently because of their post count and please don't post to increase your count. (The former is considered flaming and the latter is considered spam.)
Is it against the rules to notice that someone is a pixie (or if they only ever have one post) and then comment with a "welcome to the playground", or something like that?