There’s no way to prevent a malicious user from voting multiple times in an online poll, unless you can somehow tie it to a real world identity (and even then it’s not going to be easy).
This is just something to stop the workarounds that a 50 year old CEO was aware of.
It could be useful to prevent accidental duplicate votes. But definitely not sufficient for malicious actors.
There’s no way to prevent a malicious user from voting multiple times in an online poll, unless you can somehow tie it to a real world identity (and even then it’s not going to be easy).
This is just something to stop the workarounds that a 50 year old CEO was aware of.