No, I didn't say it wasn't safe to tow with a Caddy or any other vehicle as long as it's done safely as a matter of fact I flat tow my Sammi and my brother flat tows his Sammi his behind his Safari Trek. I'm Towing his Sammi to Medford, OR. this weekend behind my F-150, but at the posted Truck Speed, which is considered the legal speed, not 70 or 80. Just because your rig can or is capable of doing so doesn't mean it's safe to do so, under certian conditions it isn't even safe to pull it at the legal speed even with all the proper safety equipment aboard.
Hell, I'm a retired over the road driver and on some occassion I've been there and done that. Safely, yes most of the time, some of the time I pushed the envelope. Do I recommend others to push the envelope like I did? NO, I Don't and for someone to do so they are doing a disservice to others here on this board. If this offends someone so be it.
Like I said there are a lot of good people here and there is a alot of good information to be gleened from this website and I enjoy it.