Kissanime is not legal. They obtain their anime illegally. The legal websites for anime include... Amazon (They just started), Funimation, Hulu (might lose anime or already did I think they still have anime), Netflix, Crunchyroll, and Daisuki I believe all are legal.
Adding a way to watch anime would be quite wonderful but it'd take quite awhile for that to happen I assume. As for now I use workarounds to avoid this problem.