The cost of the following too need to take into account:

IF married, playing WOW can cause the following:
a. Your PC get thrown out of the house due to neglecting the opposite, OR
b. You get to spend more time with WOW with the expense sleeping with the PC, OR
c. Your PC gets a sudden death situation when your opposite pulls out the power cable

Plus you get a God-like aggro which can last several weeks, which is more uber than getting aggro during raids.