I know this is old, BUT, I disagree with you. While it might be easy to take a "...hacksaw, dremel, angle grind, or use bolt cutters in seconds..." to likely cut the crossbars your RTT sits upon, the truth is it takes much more than "just seconds" and it also takes somebody who is so broken than they would NOT care about getting caught?? Most thieves might not be super smart, but NONE of them ever wanna be caught. Those tools you named are all loud, specially against metal, and also accounting for the fact it would be extra quiet in the area as there would be nobody around (presumably when some ************ -or two or three!- is/are going to steal your RTT). This all accounts for one thing for sure: IF it's between stealing my RTT with security bolts/nuts VS stealing yours, I can guarantee you with 100% certainty it's yours the one they'll try for. It's the same principle of house alarms: YES, they can still "easily" get in if they really want to, but why tho, when they can just go to the house next door
with no alarm?
Fast forward to April 2021, and I just received my new RTT. It has the usual Chinese-made complete crap brackets that bend upwards when you try to torque the nyloc nuts. A 17mm ratcheting wrench does "quick" work of them, but you still have 8 of them to deal with. A PITA. Anyway, I just purchased a set of custom-made for my Rhino Rack VORTEX bars CNC security brackets from Wheeleveryweekend.com for $180 shipped to me. Absurdly expensive? yes, agreed. In fact, *****k, yeah they are
...but there's more and more reports nowadays of ppl trying to steal RTTs. Just my opinion.
https://www.wheeleveryweekend.com/products/rtt-security-clamps