I don't mind adding humor. But derailing a thread shouldn't be encouraged, else it will eventually become an issue for management to clean up or make policy changes for the sake of maintaining clarity in threads. I don't want that to happen, either.
Seriously, who wants to wade through countless bullshit posts in a thread containing actual valuable content?
It definitely presents a problem when the content gets detailed. Every once in a while and it's cool. Humor is good sometimes. The problem arises with those who constantly do it or are just intentionally trying to get under the skin of some forum members who don't have tough skin so to speak. There's a lot of bullshit that happens behind the scenes that we have to clean up. That takes time away from other priorities.