The problem is Facebook getting smarter nowadays. Is not as easy to create accounts as before.
1) when you create FB accounts, your MAC address is logged in, if FB detects the same MAC address, you are fucked.
2) you need an aged Gmail account to register a FB account. If you create a new Gmail account to open a new FB account, you are fucked-up too.
3) then you need to purchase a SIM card to further secured your FB account (for phone verification)
4) now FB employs facial recognition, if you upload a profile picture of someone else, its algorithm is able to detect. If you upload a cartoon photo, it flags as suspicious account. If you upload your own photo which resembles your original account, it flags as duplicate account and FB bans both your accounts.
5) IP address, you cant use dedicated proxies too as FB maintain and updates a list of IPs that are suspicious. your account will be flagged.
Hence, what else can we do?