I don't know if I can give a specifically "anarchist" answer to this, as it is all bound up with being godless, hating civilization, and generally being alienated.
My attitude is that death is something that comes to all of us, whether anarchist or not, whether in our armchairs or in the street. It is part of the cycle of life, necessary for other life to occur. As an anarchist and someone who is critical of civilization, I think that our culture (to be specific: Western industrial capitalist culture) glorifies life to the detriment of death. I look forward to feeding lots of other things in death. If it is possible, I'd like for my loved ones to do as Ed Abbey's did: Abscond with the body, either leaving me somewhere, or burying me shallowly, without all the hoopla, sterility, and toxicity that a legal burial or cremation requires and begs. Preferably I would be left somewhere with trees who have moss that hangs low and ferns that grow almost as tall as I am (I'm kinda short, so that isn't asking that much). But all that is beyond the question at hand, and beyond my control, I'll be dead, it won't matter to me, nor will I be able to somehow guide others actions from beyond the grave.
As much as I do not want to artificially extend my life (or prevent my rapid decay), I also think that sometimes death is treated by anarchists in a somewhat flip manner. I like being alive. I like feeling, experiencing, being. If I didn't, on some level, I would be dead now by my own hand. Often I feel hopeless and unable to change the things that I hate, but I find those feeling authentic and valuable. I have no desire to quicken my death, and I will do all I can to avoid death, as most living beings will, but a knowledge that death will ultimately come, combined with a hopelessness also means I (hopefully) act in ways that further my experience of living.
In short (and because I can't resist the opportunity):
"Death is permanent, irreducible."