If you put the saw horses right next to each other, a couple feet apart, the weight of the ends MIGHT bend it out of shape... but most reasonable people would put them a few feet in from each end, intuitively, better distributing the weight.
An engineer friend of mine told me that if you put them at 1/4 to 1/3 in from the ends, keel up/gunnels down, they'll be fine. Here in LA, I have a 14.5' stitch and glue canoe and my supports are roughly 8' apart.
I also have an OT wood/canvas canoe that lives with my cousin and his two OT w/c canoes in NY... in his garage, each of them hangs from a cradle, keel down. We put four screw eyes up into the ceiling in pairs, about 3' apart across the thwarts, and about 8' apart along the keel. There is a rope tied to one eye which then goes across through the other eye, and is tied back on itself with a tautline hitch, creating a cradle. The canoe lays in the cradle, and then we tighten up the tautlines to raise them up out of the way of his cars. His two canoes (15' and 16') have been hanging that way since the 1960s without being deformed. Prior to my canoe becoming resident there, there was an 18' grumman aluminum canoe in that sling (it now resides outside.) Oh, and the various life jackets and most of the paddles are stowed inside the hanging/slung canoes as well.