Do you belong to a "group"?
Does it have an acronym for a name?
Does it make you feel more like you or less like you when you attend your acronym-named group's functions?
Do they provide you with a "name tag"?
Do you have to pay them to let you in?
Do they have an email group on which certain members are subtly hostile and make thinly-veiled attempts to assert themselves as being "right"?
Do you hate yourself for joining?
Do the subtly-hostile experts within your group determine who is "in" and who is "out"?
Are you "out"?
If you weren't wearing your name tag, would your "group" even know who you are?
Is it time to renew your dues?
Are you afraid of being "alone"?