Meme or whatever, but fuckwits that keep cats outdoors (and cat hoarders) are the main reason why my charitable donations to animal groups focus on spay/neuter programs rather than shelters. I know the animals in shelters need help too, but reducing the inflow of animals into the shelters helps them as well.
And reduces hazards to wildlife from cats, whether they be outdoor pets, strays, abandoned, or feral.
And reduces demand for meat-based cat foods.
It's the most efficient way to help that I can think of.