If you see a token in your Assets screen that you do not recognize, you are not alone.
Some projects send tokens to many wallet addresses—including Argent wallets—as part of bulk marketing campaigns. This is a common tactic and does not mean your wallet has been compromised.
There is no way to block incoming tokens to your Ethereum or Starknet accounts.
To hide an unwanted token:
Go to Settings > App settings > Token visibility and toggle it off.