Big discussion with loan officers. Our on-line banking does not tie separate EINs onto the same log-in.
Loan officers would like to change this so Big Guy owner of several distinct companies with own EINs can go on-line and transfer money back and forth and also to his personal accounts.
Right now we restrict log-ins by EIN... and we do not allow mixing of business and individual.

How do others see this issue?

We do not allow them to com-mingle funds between accounts. We can (and do) tie multiple accounts together in our business online banking cash management function for entities with the same owner, but even though they can see the different accounts, they can't transfer between them.