Both of you are wrong. Appealing to fallacies doesn't make a good argument, but neither does pointing that out knock down an argument. That'd be the “fallacy fallacy”.
Appealing to "accepted norms" is another case of appealing to authority – except a less verifiable authority, in that case. Ironically, I am currently listing fallacies, which itself does not a good argument make – so I will add to it that that's not what “informal” means; the adjective is merely specifying that it is not a logical flaw, but instead falls into a broader category (such as implying stronger evidence than exists, or something).
Your original argument is flawed, however; it neglects that organisations cannot increase the talent available to ethical companies and decrease the talent available to unethical ones by participating in the job market, and invokes an argument similar to the tu quoque fallacy by implying that Mozilla's actions have any bearing on how good its advice is.
Merely calling out that you used a fallacy (and misidentified at that!) is not a sufficient counterargument alone.
Yes, "informal" isn't "logical", hence the italics specifying as much.
No, my response wasn't a counterargument because what I was responding to wasn't an argument to begin with. There was nothing to defend because nothing of substance was produced.
No, my original argument is not flawed because your counterargument has nothing to do with the concept we've been discussing in this sub-thread.
Allow me to summarize: Mozilla sucks and yes, students should consider ethics in their job search which means they should probably not work for Mozilla.
Appealing to "accepted norms" is another case of appealing to authority – except a less verifiable authority, in that case. Ironically, I am currently listing fallacies, which itself does not a good argument make – so I will add to it that that's not what “informal” means; the adjective is merely specifying that it is not a logical flaw, but instead falls into a broader category (such as implying stronger evidence than exists, or something).
Your original argument is flawed, however; it neglects that organisations cannot increase the talent available to ethical companies and decrease the talent available to unethical ones by participating in the job market, and invokes an argument similar to the tu quoque fallacy by implying that Mozilla's actions have any bearing on how good its advice is.
Merely calling out that you used a fallacy (and misidentified at that!) is not a sufficient counterargument alone.