I keep finding links to items such as this one...
...that claim some connection to Tendai but in reality have nothing to do with Tendai or in this instance Buddhism of any stripe. This is but one example. If you want to learn Tendai Buddhism, avoid this.
I don't particularly care what creative people do with their time on the internet. Just stop calling it Tendai or Mikkyo and you'll have no disagreement with me.
I'm bringing this up here because I spend an inordinate amount of time trying to help people unlearn the stuff they pick up on teh interwebz when they decide to move on. (they inevitably move on.)