Depends upon bag style.
On hobo or messenger bag, look dumb, imo.
On any bag I set down or handle carry, as structured tote, yes.
Because I neglect both to use bag hooks & to inspect surfaces where tossing stuff.
Feet are my tiny nubs of hover safety. Between leather & pink cake crumbs.
I need them. Some of my bags have 5 feet, just to be extra wary.