We already don't accept VOIPs, they get denied.
The process is:
When you first sign up, you enter your city state
You get kicked to be verified.
We do an IP Look up (It better match your city, state you entered)
We call your phone # (It cannot be a VOIP)
We do a reverse phone lookup (It better match your city, state AND Ip lookup)
We look for multiple accounts (Anything close to the same phone #, IP etc)
It's very hard to get around.