Ok, so first off, VMK CAN NOT "ban your hardware". It's not possible. They *can* ban your IP address. Getting a new computer, deleting the hard drive and "deleting the ram" (which also isn't possible as that is the *physical* memory in your computer) won't do a thing.
In some post I made somewhere about this topic I've already explained the type of IP that your ISP gives you. Typically it is a "sticky" ip, meaning unless you turn the cable or dsl modem off for a number of days, when your modem goes to renew the lease on the IP, it will "prefer" the one you have already. If your modem is off for, however long the lease period is, then you won't have an IP so it'll just pull a new one out of the pool of IPs.
Second, they can issue a ban on your user id that is temporary -- it's not usually done at the cookie level, since naturally, you can get around it via clearing cookies.
Just clearing up your misinformation.