I can't help but sense a bit of frustration here on the part of some.
As time and boredom strike me I hope to add more.
Joint cracking has some negative social implications that seems to have really messed with some people's heads.
Joint cracking has not been significant enough of a health problem to interest the medical community.
Joint cracking is ubiquitous throughout the population.
As a result of the above, since joint cracking is found equally in all types of people: some people who crack their knuckles have arthritis and some people do not, some have Obsessive Compulsive Disorder and some do not, some have vertigo and some do not. . .
Some of the people who have arthritis and crack their knuckles blame their arthritis on knuckle cracking.
Some of the people who have OCD and crack their knuckles obsess about knuckle cracking.
Some of the people who have vertigo and crack their knuckles blame their vertigo on knuckle cracking.