I see no problem with the arguments. Like NOTLD said, where do you draw the line?
, I guess when the arguers start repeating their same arguments, then it's obvious they've exhausted logic and have resorted to hoping to win the battle of attrition. To be honest, I sort of zoned out on the arguments after the first 10 or 12 and so I can't really state with certainty that the same arguments were repeated, but that would be my test.
So repeating same argument, flip the kill switch.
Another trigger would be name calling
. Not that some of the name calling isn't amusing, but it is a strong indicator that the arguer has once again run out of logical basis and has to resort to plan B. I dont' recall this trigger being reached yet (though my eyes were glazing over after a while), but it has been known to occur with at least one of the posters involved in this argument case study.