HDFC Bank — Another netbanking session is active

HDFC is stupid and so are many banks like SBi, etc. when using basic Web technologies to provide simple functions like accessing our accounts - I'm not sending spacecraft to Mars, stupid.. Web technology has been around for over 30 years now and the callous behavior of our arrogant banks like HDFC, continue to frustrate and deny our basic services.
If another session is active, as a basic level of security to be provided to me, they SHOULD logout the other sessions automatically or give a choice to do so, because if the other session is active without my knowledge, isn't it a lack of common sense (aka stupidity) to allow a fraudulent other session to continue the activities while not allowing me to take any action on my account ?
Yes, as the saying goes, STUPID as stupid does - in this case HDFC.