I think it's ridiculous, especially since the rules about clones are so open to interpretation. I'd also like more information on why they felt this was absolutely necessary, if they plan on making any changes, and if so, what they will be, what their plans are in the long run with this, etc... You shouldn't just implement something without at least explaining it and your reason for implementation.
Heck, I would've preferred if they'd just brought back the turnstiles and charged us to ride the rides. I'm sure there's alternatives to this. It wouldn't be as bad if the code was valid for a certain time period (30 minutes would be too short IMO), but at this point, I'd prefer to pay. The first couple times I tried to ride, I couldn't even get on. I had to go to an empty instance for it to work.
I haven't gotten any at all, so yeah :x