A Dutch hacker has used an exploit commonly left open when jailbreaking an iPhone or iPod touch to try and extort €5 from a number of T-Mobile Netherlands users. Ars Technica reports that the hacker used port scanning to identify jailbroken iPhones on the network that had SSH running. As many users who had activated SSH had not changed the default root password, the hacker was able to hack into the devices and send an alert that appeared on the…