Maybe it is just the way I read that last line but it seemed the OP was gloating a bit that they may have got the other person in trouble. Unfortunately the majority of people actually seem to like it when they have a a little bit of power over another person. Just my observation.
I also find it a bit ammusing that the OP walked out of the store without paying the for the snake they actually bought, but once they received several advises that they should, then then made amends. Again, just my observation.
Another observation, I am darned good at what I do for a living (Project Manger for a construction company), but the funny thing is that I didn't start my carreer knowing everything I know now AND I nearly learn something new everyday. Also, when I or one of my employees make a mistake, we are not immediately fired. I think I remember reading the OP stating the store had a guy who really knew thier stuff. If that is the case then this person sounds new. Maybe I am a little strange but I believe a little compassion is not that bad of a thing. I just tend not to argue with people unless they force me into that corner. Now if the employee continually provided wrong information, continued to allow animals to escape, continued to be rude, then maybe it is time to talk to the manager. Again, maybe I am just strange.
dc