Not sure yet. She begged for Damon to make the pain stop and knowing Damon she must have known what that meant. It will be interesting to see Elena without feelings, I just hope she doesn't do anything that she will regret when she has her feelings back.

Of course it will cause tons of problems, but I think it was the only thing to do. Any one would do the same seeing the person you love most draining in incredible pain that won't stop, especially for a vampire who feels everything so much stronger than humans. Elena would lose it anyway soon, there was nothing to hold her anymore.

for at least one episode It will be interesting storyline

I'm not sure it was the best thing to do, but she would have done it herself anyway, so yeah. It surely will be an interesting storyline! (I hope)

I can't wait to see how Elena acts now that she doesn't have humanity. I love her either way but it will be cool to see. I do think it is the only thing that he could do for her in that moment. I think it will help her for a little while until she starts killing people.

1) There is no "turn off"
2) He can undo it easily.
3)What it says.

There really was no other choice. Like he said, she couldn't handle this. And it's not like she'll never get her humanity back. It's only temporary. Let's just hope she doesn't go too far off the deep end.. but she has guidance/help, so. We shall see.

she couldnt handle it. and damon didnt want to see her like that. so he was thinking about her. he new it would ruin her.

i don't think it's the best decision. Because probably she will feel even worse when it's all done. But he had the best intention,.