Morality Question: Am I being an ass?

[Oscar77]

So I belong to another forum/chat room.

Guy posts about a deal on some primers.
People start buying them and realize that the company doesn't appear to be charging hazmat....... either by mistake or maybe they are eating the charge.
But either way the orders are shipping and arriving to the buyers.

Well another member calls them about it, they realize/admit their mistake and pull the offering. They are now out-of-stock.

I felt like telling the guy, politely, that it wasn't his business to call them and ask about their lack of hazmat fees.............

Am I being an ass?
I'm letting it go...........but still...........
Would you have said something?