> you really shouldn't be hacking some scripts on top of your bank login

You can hack whatever you want, but from a SECURITY perspective this is horrible and the banks know this. There are secure ways to store credentials for scripts but most people will just hard-code the values or stick them in unencrypted ENV vars. Also, who's fault is it when the bank updates their website and the selenium script does something horribly wrong? Tell me more about Disney...