Different people have different views on how they wish to deal with life and former friends/acquaintances after leaving the WTS organisation. Some are happy to leave it all in the past but I see nothing wrong with challenging stupid behaviour if done in a way suitable to the context.
According to Cofty's account, here we have a couple who seemingly are no longer completely under the control of the org yet persist in maintaining the worst aspect of the social control norms of the organisation - i.e. the "lalala, fingers in ears, I can't hear you" avoidance of any minimal acknowledgement of an ex-JW.
The guy could just have reacted to Cofty because he thinks Cofty is a belligerent arsehole. Maybe that's true. but even though I've never met Cofty, nothing he says on here suggests to me that he is needlessly provocative, belligerent or any type of person even approaching an arsehole. I suspect that it's more because Cofty touched a nerve about this guy's hypocritical and illogical actions.
Well done Cofty.