My buzz bolt has been torqued many times.
I've never considered torquing the snot out of that bolt to be a satisfactory solution. The bolt passes through a tube that lays in a cradle on each vertical frame member. When we tighten that bolt, we're effectively trying to compress the vertical frame members against a horizontal cross member. It's a lot of force to apply to the bolt.
On four or five bikes now, my approach has been to apply silicone adhesive to the cradles, then squirt silicone into the tube on the bolt end, lay the tube in place and push the bolt through which spreads the slicone through the tube and embeds the bolt in a nice layer of cushioning goo. Then you can tighten the bolt to a reasonable level and still not worry about the buzz.