Regarding issues that were brought up earlier, that is, is it helpful to laugh at creationists, the consensus opinion seemed to be, "No, it's not helpful." In fact, one poster mentioned that it is that sort of attitude that is why she refers to "atheists" as "assholes."
I would like to offer, if I may, a dissenting opinion. When someone says their god (an invisible, intangible being) infused a soul (an invisible, intangible imaginary vapor) into a human ancestor at some unspecifiable date by an indescribable mechanism, we need to be civil — one shouldn't point out that that is credulous unscientific garbage and should be laughed at by any scientist worth his degree and any scientifically literate member of the general public?
That's not a position I agree with at all. To quote Richard Feynman, "Reality must take precedence over public relations, for nature cannot be fooled."
It could be that I simply like Thunderf00t's videos from wayback, but I digress.
Oftentimes, engaging in these sorts of debates isn't intended to convert the person you're laughing at. It's intended to convert, if indeed convert is the right word, onlookers, or at least get them to see that the person on the other side of the debating table is taking such a credulous position of unscientific garbage, so horrid in its conception it it meets the "not even wrong" category of scientific error.