Last time I checked this was an open forum, meaning people can express their opinions in whichever way they want to, you or others might have found Volty's jokes unacceptable given the topic of discussion, but he posted what he felt like posting.
Tbh, the posters shouldn't go around with this moral policing and teach people how they should react in a certain situation, you can always have reservation over what a poster said, or be judgemental about him, but you can't demand him getting banned, just because of that.
There are plenty of good mods around here, and if they find anything offensive about Volty's or anyone else' posting, they would do their job, without even anyone making a noise about it.