Force disconnection

[Baneus]

Two reasons: Not everyone uses the OTP (which doesn't make an account 100% hack proof anyway) and a force disconnect feature can be reverse engineered to gain access to an account; it's a two way street.

Think of this analogy: It's better to have thin air to nowhere than a well fortified door that leads to something of value to you. I'm not tiring to shoot down your idea for fun, i'm merely pointing out how it is.

If someones computer is compromised to the point where it is vulnerable to MiM attacks, then losing their SE account details should be way down on the list of things to be worried about