> how are they supposed to be able to check for copyright infringment against every single upload?
"Did you create this item from your own efforts without the inclusion of material copyright to other entities? Y / N"
That's a filter. Not a particularly sophisticated one, but the majority of websites shouldn't be hosting anything that answers N to that anyhow. Little Northville Cycling Club, for example, probably shouldn't be hosting satire based on copyright works. It's just too legally risky.
"Did you create this item from your own efforts without the inclusion of material copyright to other entities? Y / N"
That's a filter. Not a particularly sophisticated one, but the majority of websites shouldn't be hosting anything that answers N to that anyhow. Little Northville Cycling Club, for example, probably shouldn't be hosting satire based on copyright works. It's just too legally risky.