An accepted answer can only be deleted by the moderators (which will not happen unless the answer is flagged by users and the moderators agree with the flag).
The answer OP (yourself in this case) can delete it if it has not been accepted (regardless of votes).
That it is grey is a reflection of the score being very negative (score is the number of upvotes ...
We can't force people to vote. There is no way to do it. No SE site has found a way, anyway.
I have my own set of rules in regard to voting:
if I answer a question, I always vote. If I decide to "dignify" a question with an answer, I "dignify" it with a vote. Here on parenting it's always an upvote, not always so on SO.
if I can understand the question ...
I can't post this as a comment, so I am posting as an answer. I had not upvoted his answer as of reading this, so I opened IE 11, logged in, visited the URL, opened the dev tools, then upvoted.
The vote went through w/o an error.
The Request was sent to /posts/14990/vote/2 and the body was populated with (obv I have corrupted the key with the F's):
[sorry this is more of a comment than an answer, but too long]
As a user I sometimes is confused what voting up a question means.
Does it mean: This question is well written, and asks something within the site guidelines?
Does it mean: The question is really interesting?
Does it mean: I really want an answer to this too?
I feel sometimes this is ...
Your post motivated me to ask a question :) I just realized that I it would appear that I'm a perfect parent with all the answers since I hadn't asked a question yet.
I think I agree with Torben on the question up/down votes being anchored to the question itself. Is there any way we could maybe "freeze" the question title and up/down vote buttons in place ...