Not even the house elves would pick them up. I advise whoever they belong to to gather them before I have them incinerated.
Oh lookie here, -levitates it with his wand- Reckon I might use this to wash Snivvy’s hair.
What you say Lils?
-holds her hand over her nose and mouth, shaking her head in disapproval- That’s disgusting, Sirius. You should leave Severus alone.
Even I wouldn’t wash that smell onto my worst enemy.