What it means
Blocking a person in Google Drive prevents future sharing with that account and changes mutual access. Removing a shared file from your view addresses one item but may not prevent the same account from sending another file or comment invitation.
A real-world example
A spammer sends three fake invoices in Drive. Hiding one file does not stop the other two or a fourth share; a confirmed block targets the sender account.
What to do
Check the owner, block a persistent abusive sender, and review any previously shared files you might need before access changes propagate.
The distinction that matters
Work and school domain rules can prevent some blocks. Google warns that a block affects sharing in both directions and may take a short time to appear, so it is not merely a visual inbox filter. Save legitimate collaborative files before changing that relationship.
Google's Drive block behavior