Your 5 year old is now magically holding BrandNewKoolAid™ instead of the original Coke. You grandpa has a fishing rod from BobsFishingEquipment®.
But what happens when the platforms get into it themselves?
Today using a loved one's image in a deepfake advertisement might seem invasive and wrong. But I wonder in the future if this would be seen as something acceptable. I'm sure somewhere there's a social media site that is carefully constructing their T&C's to allow them to do this if they so wish.
For some tiny group that's below-board anyway with hacking people's social media accounts, I guess maybe there's not much you could do. But for any social media site or other platform, I imagine that IP lawyers trying to protect their client's likeness would descend in packs, which is a probably a genuine deterrent to a group considering implementing something like this.