Here's a very anal-retentive question you should probably pay no heed to, but I'll pose it anyway: Would cavemen really have left meat hanging in the open, like that? Seems to me like it'd attract predators 
I dont think anyone knows
though meat was cured (like biltong or jerky) form early times and often smoked too so yes suppose it would be hung for use later on.
i doubt the meat would not have been hung willy-nilly. if it wasn't hung in a secure location - like in a hut - it was guarded.
i recall a History Channel (or was it Food Network?) show about the history of Barbeque. the Native Americans smoked and dried the meat in the open fields, on the beach, etc but also made a big deal of the whole process so lots of hands - and eyes and ears etc - were available to help prep. i assume the big ruckus also helped keep curious predators away.
perhaps it's a commentary on Modern Society that we can have a restaurant seat 100 people who still basically eat alone and completely divorced from the food preparation process that used to require the whole village or settlement.
but i'll avoid the social commentary!