On the Ticket Exchange it's just WTB hardly WTS. Should I risk going without tickets and then buying them from a scalper? Isn't that illegal? What are the rules?
It's not illegal. There's no risk of getting shutout unless this season much different than any other. If you hang out around the big tailgates there's even a chance you can get someone to give you two for free.
If you need the peace of mind of having the tix in hand before you go just keep hitting F5 on the ticket exchange board. They will be selling them up until Saturday morning on there. It happens every week.