Not really a fair comment since your original position was one of disbelief of there being a boycott.  "I would love to know who organized the giant boycott?! I'm calling bull on that." 

The size of the boycott notwithstanding, the response pointing out that one particular person may not be aware of a boycott is completely valid point in response to someone calling "bull on that" from their perspective.  

It follows that saying if something isn't happening in ones neighborhood then it must not be happening else where is a logical fallacy of Hasty Generalization.

Dismissal of their point with the added ad hominem attack only harms your own credibility.