Steam has a 'trading card'-social-media *thing*. I don't really get it, and I have zero interest in it. 

As far as I can tell, it basically serves to clutter up the Steam interface, and constantly barrage you about new junk in your 'Steam Inventory' that I frankly don't care about.

Is there anyway to disable the whole thing? Maybe I just hate (certain types) of fun, but I frankly completely fail to understand why I should care about the whole affair at all. It would make the steam client a lot nicer if I never had to see any of it again.

There doesn't seem to be any way to just delete cards from your steam inventory.