Some people will jump on a comment about guillotines and say that's it's a call to violence.
But in practice, you're never going to get a billionaire into a guillotine by strongarming them with a mob. They're usually too well protected or reclusive.
The guillotine is more of a reminder of the historical context of how the common people express their dissatisfaction with the ruling class.
It's not okay to kill people. But they are killing us. It might not look like a direct effect because they're not walking through the streets shooting people. They're just "steering us headlong into apocalyptic climate disaster." This way they can kill far more people than by walking through the streets shooting people. And while that might not necessarily be their intention, it is the effect they're having on the world.
About the composting - if you live in a region which has a professional compositing facility, properly sort your rubbish and don't compost on your own.
Composting emits a lot of greenhouse gases and professional facilities capture them and use them in less harmful ways. So if we were all in-house composting our bio-garbage it would be more harmful for the environment than using communal services.
It's a little bit different for gardening products - those first capture greenhouse gases and would rot on ground anyway so composting kinda balances out. But still, for example if you're cutting your grass just leave it on the ground and rake it. This way it's not gonna rot and will fertilize your lawn.
If the only gardening related activity a person is doing is composting, that might be a net addition to climate change, not a mitigation. Most forms of composting cause C02 to off-gas, enough so that it's often recommended to keep compost piles near trees or other vegetation so those plants can absorb some of those emissions and benefit from them.