I know undocumented immigrants can open a US bank account legally and that would come with some benefits for them such as having a credit score (useful for buying properties, for instance) and a history of their presence in the US.
Both are signs of good moral character if the immigrants get to immigration court and that could mean they don't get deported.
The question is: will opening a US bank account be a tangible risk for the undocumented immigrant? Will the person be caught just because of the bank account? (supposedly, the immigrant hasn't committed any crime)