Sorry not /thread
No. Don't do that. That's like telling someone to wear thick socks if a pair of boots is too big. I wear a size of boot, that, fits a medium and a large version of a particular binding. Fortunately, a local shop had a large binding and when I put my boot in that supposedly fit the large binding, my boot did not fit. The binding was way too big for a boot size that supposedly fit.
Ya, and I've fit numerous people into bindings this past year where the boot couldn't even get into the back of the binding because the boot was too big to fit securely into the heel cup. So yes, if you cannot physically try them on, your best bet is to go for the larger size, especially if you are right on the fence with sizes. There's a greater probability that you won't fit into the smaller size, than the bigger size.