Final answer:
Sirius Black was blasted off the Black Family Tapestry because he was disowned by his family.
Step-by-step explanation:
In the Harry Potter series, Sirius Black was blasted off the Black Family Tapestry because he was disowned by his family. This happened after he ran away from home at the age of 16, following a tumultuous relationship with his family and his allegiance to the Order of the Phoenix.
Being disowned from the tapestry means that Sirius' name was removed from the family's ancestral record, signifying their rejection of him. It was a punishment and a way for the Black family to disassociate themselves from Sirius.
Being disowned from the family tapestry had significant emotional and social consequences for Sirius, as it represented his severed ties with his family and his inheritance.