The problem with constantly shuffling MAC addresses is that they are used for device authentication on corporate/school/university networks. Does anyone know of a utility that generates MAC addresses as a hash of the SSID?
You can scan for the networks in the area, select the one you want, run the name through, say sha256, select the first 8 characters and reset the mac address to that.
I can't imagine much has changed since then, just add the logic to change the mac address between entering the SSID and actually connecting.
I guess you could get around it by hashing the ssid + a personal salt.