Would you do business with this man?

If someone drives unethically, taking advantage of others, ignoring basic courtesy, what makes you think they do business ethically?

Here's the typical guy - white, middle-aged, driving a posh German car (always the way round the M25), cutting into the exiting traffic at the last minute, while everyone else was able to wait the few short minutes. Now, given he's clearly out for himself, why would you consider working with him?