No one told me when I was born and not even in the many years of my life so far, that I need to post on a DB to spread knowledge....thank god someone finally pointed that out to me.....someone who himself has enough time to waste by not only barging into so-called useless topics, but also taking time off for a properly worded arguement against posting in such topics...
I, of course, post when I have time to spare, waste, use, whatever...and on whatever topic I find useful, whether useful for increasing my friend-count, or putting my opinion into words, or to make sure that my slightly existent writing skills don't go extinct...

So, post when you want, don't post when you don't - no one is forcing you to read or post.....so please don't force anyone else to read your posts and act according to what you deem right....go and preach to someone else....
Btw, I always thought the full form of DB meant 'discussion board', not 'useful information filled discussion board'...