I know, but their continued existence will kinda fuck with TF2's item counts.
plus, I get paranoid about the stupidest things. for instance:
suppose that Valve will do something special every time a now-unobtainable (sans-trading) item ceases to exist and they remove it from the schema. (it has never happened yet, you can't prove they wont do anything or even keep it in the schema)
now suppose that someday the last few of some limited item are all abandoned on VAC-banned accounts.
stupid shit aside:
I checked the backpacks of a few of the recently banned accounts linked from the ugcleage forum post. so far their items are still tagged as tradable/marketable and I found no indication of any trade-bans (at least, not yet)
Valve's support page regarding items and VAC-bans still currently states that TF2 backpacks will be emptied