It sooooo bugs me when people post photos I'd *really* like to share on further, but there is no alt text *even at all* so I feel I have to pass on that boost button…

Please, include alt text! It doesn't need to be a novel. Something like "a red and white dog standing outside in the snow" or "a cardboard box full of books on a table" or "a tree with green leaves and white flowers" is already a million times better than nothing.