This was discussed in depth in a previous discussion in the topic, but your assumption that it's trivial to create a fake Facebook account for this is wrong. There may be different experiences but you should assume you'll need a valid mobile number or a valid-looking social graph, or both.
Not just for this purpose, but Facebook accounts in general. If you try to create one without a valid number and/or seemingly valid friends list, chances are it's blocked in no time.
I don't know a thing about Google Voice, but I for one wouldn't bother setting up some fake numbers to create a fake account to use my own hardware.
I recently created a Facebook account with a made up name and a new Google Voice phone number to sell an old monitor and the account was disabled within 2 hours.
I tried to create a work Facebook account using my work email address and phone number and they required SMS verification. I tried all manner of services, even Twilio but Facebook seems to be able to differentiate.
