Note: This article isn't for everybody. People who write fanfic just to write fanfic and have a happy time with their characters needn't bother to read it. It's intended for fanwriters who've said they want to be told when their writing is clichéd, purple, or simply wrong. So now we've told you. Go and sin no more.
I might as well throw in the towel on these, but I will go down Bearing Witness that current usage is wrong wrong wrong.
The ramifications of this?
You cannot in the present 'lay down' on anything unless you're putting duck feathers somewhere. 'Sometimes I lay down on the ground and look up at the sky.' No you don't. You lie down on the ground. Equally, in the past, 'I was laying on the sofa when the phone rang' prompts the question 'laying what on the sofa? Bricks?' But '*Yesterday* I lay down on the ground and looked up at the sky' is perfectly kosher. So is 'I was laying *Bill* on the sofa when the phone rang,' though a bit crude.
You cannot lay someone or something in the past. 'He lay her on the bed and pressed burning kisses to her bosom.' He didn't. He laid her on the bed, all senses of the word. Is this too indelicate for your maiden ears? Live with it. It's laid.
Related dangers- ebony eyes, ivory skin, ruby lips, those crystal tears. Use only if you're actively trying to sound like a bad nineteenth century novel. Jade scepters belong in a class of their own. (See below.)
Then we have profession-- how many 'pilots' can dance on the head of a GW story? Distinguished by hair colour: the black-haired pilot, the brunette pilot, the blonde pilot, the pilot with the braid. And so on-- the Chinese, the half-Japanese, the half-youkai, the former crime boss, the cute rock singer. The emerald-eyed youth. Please point me to a teenaged guy who thinks of his best pal as a youth, let alone an emerald-eyed one. Why does no-one use the epithet 'stinking little bastard,' one wonders? 'Duo lay the stinking little bastard on the bed and drove him to the throws of extacy' at least has the merit of being the God's own truth.