FORCE everyone who gets a raffle ticket to put their name on the opposing ticket. Problem solved instantly.
Actually, by this logic you don’t even need raffle tickets. One could simply use small pieces of paper with names on them.
Naturally raffle tickets are easier to manage so I say we stick with them and as people are given a ticket, we write down their name on the opposing ticket. Since we already have to check their gamer handle, we could use that too…