i don’t think it is worth curators spending the time flagging them, unless the stated rules change. My guess is people who do this will probably tire of it pretty quickly unless there’s a really good reason for it, like particular annotations and fields associated with each given individual…
Either way, you can’t really use iNat data to determine abundance beyond a general overview, anyway. So it isn’t diluting the data either to add the six geese as six observations or one observation. If it’s birds you are interested in and you are interested in tracking abundance and absence, eBird is a better way to do that. Sadly there aren’t equivalents for all taxa (there is an eButterfly)