The topics that really are simply stupid are the "Oh I just hit my XXXX post" threads. Who gives a forget? If we wanted to know, we'd go to your profile and find out. So we're supposed to applaud you for wasting your time on an internet forums positing crap like "ZOMG COOKEYZ!!" 40 times in different threads? Yeah, I'll get right on that...not.
And for birthday threads It's cool if you announce it to a few close friends, that's okay. I'm sure the majority of the forums don't care. If it's for some weird grandiose contest, for a blockland key to cite an example, I'll be amused just to see who is the biggest suckup. In fact, I might just pull that off for my Birthday this year since I saw the results of Bisjac's little contest. The results were numerous and rather creative, I'll give you people that. It was a good time to see the large banner someone made for him. As far as I know, he still has that with him.