Yep, lots of them out there.
PS: Not trying to create a debate about this. Just sharing what I learned through personal experience with my recall on a Keystone product and a good friends with a FR RV. I'm also buddies with some of the guys from my current brand of RV who told me about fines they've seen and experienced in the past in their careers. To be honest though, I haven't heard about it being enforced in quite some time...
Back to to he regularly scheduled programming. OP, I have had TH's that are both double and triple axle. I find my current triple is much more stable than my past double. Sure it scrubs backing a hard corner into my driveway. That's the nature of a triple. Doesn't hurt anything though.