The above commenter was calling into question my character because I had just created my account today. The definition of ad hominem I'm familar with:

"Attacking a person's character or motivations rather than a position or argument."

The commenter seems to imply that because I created my account recently, that my argument is therefore somehow not valid. I would consider that the be an attack on my character or motivation, rather than addressing my position. Would you agree or no? May have been a bit of an editorial stretch on my part, but it certainly doesn't call for you actually calling me names and insulting me. I'm just here for some banter. Your comment is obviously malicious, and I think you're better than that.

Edit: yep, downvote and move on. Exactly what I thought. Classic potato behavior.