Currently I have my own full bitcoind node running on a VPS and an LND instance connecting to it and working fine.

However I am thinking, what if I share access to my bitcoind node to some other users willing to connect their own LND instances to it? So, in the end there will be independent LND instances serving for their users but running on top of a single bitcoind instance.

Do I have a risk of exposing data/balances/transactions between these users? Do users have risks of me taking the control over their wallets?