Not touching on the DRG topic, I just want to address the OP. No, You did absolutely nothing wrong in the situation you described, and yes, those people were being greatly oversensitive regardless of the current situation of BRD/MCN. I'd say don't judge them harshly because of it but honestly you'll never see them again most likely.

Now, before anyone goes and assumes this or that... I'm not talking about >legit< insults here, as that is always annoying... But not jokes... welcome to being an adult... If you're not sure if someone is joking or not the proper reaction is never "Be a triggered baby and ragequit", because in that situation, the only loser will be you.