That is a side effect. The primary reason is to rebut you.
I'm mildly surprised you haven't dragged out that moronic tariff picture. Did you lose it?
Why, did you want to see it again? Here it is:

If the picture annoys you then you must see something in it which contradicts what you wish to believe.
If it showed what you wanted, you would be all in favor of showing it. Clearly it doesn't.
Then ping them and leave me out of it.
If I leave you out of it, they won't know the context in which the message I am quoting was made.
If you want to be left out of it, just stay out of it. I won't normally ping you, though BroJoeK has a habit of doing it.
With the same old crap, over and over? It's obvious that the primary reason is to be annoying.
If the picture annoys you then you must see something in it which contradicts what you wish to believe.
If I leave you out of it, they won't know the context in which the message I am quoting was made.
Oh I think they can. Not everyone around here is as dumb as you are.