Yeah, I don't even really want/need to see a join date, although in this forum I'd be satisfied with mine as well. As silly as it sounds, there's a reason why even on job applications and such we like to put laws and rules into place that limit the amount of personal and often meaningless information on them. It can lead to situations of bias and possible discrimination. In forums, post counts and join dates can influence people in the same way and it can cause good information, ideas and discussions to be put down or devalued by others who feel the poster hasn't been around long enough or has enough posts to make them a credible poster.
Feels quite foolish to even consider such ideas, especially in an online forum, but it's a valid thing to be concerned of. Fresh ideas and faces can be a good thing in developmental processes, and the last thing people need is someone bashing it because their number is newer or smaller... it only takes one inconsiderate troll to get a topic locked or derailed... (even though they can still do that no matter what steps are taken to 'protect' the younger or infrequent posters)