There is no sense of humor allowed there from what I can tell.
I've never logged in to use them, but I've read some of their answers that came up on Google searches.
I looked a few times into quora pages while researching in google, but did not register, as I am already in too many on-line groups.
I think I stayed on there about a week. A little too stuffy for my taste. Besides? You can't answer your own questions !
I've read a few answers on there, never logged in though.