What information you do seek of? If what kind or type of wallet a person been using? You can eventually differentiate if he's using a custodial or non-custodial wallet if you do base up on inputs and outputs and address inside of it but if you do particularly mean of finding that persons information then thats the impossible thing and this is what makes this crypto-space decentralized and anonymous.
You can make out transactions without letting other parties know your true identity unless if youve been using exchange accounts wallets which would require KYC then your identity is known and
thats the disadvantage.