Why do you insist that is not meaningful? Of course they will vote for the language they like, that is the purpose of the poll. Obviously people can vote from ignorance, but that goes both ways. Just as some people "dislike" cobol despite a lack of experience with it, so too do people "like" PHP despite a lack of experience with it.
This may seem like petty semantics however it is no worse than preaching to others from a position of ignorance.
This is not a pool for finding what is the "Best Language" (best language for what ?), but a pool to find what languages programmers like or dislike.
That is a matter of personal taste and opinion and there is not a wrong or a right answer.
Obviously if you have never seen or used or looked at the language you shouldn't vote on what other people say, but you don't really need to know the ins and out to make a personal decision.
The definition of "like" the verb is "To find agreeable, enjoyable, satisfactory". The key word in that definition is find. How can someone "like" (in the true meaning of the word) something, or for that matter "dislike" something, if they have never "found" (/used) that something in the first place.
Therefore it is incorrect to say that you personally like or dislike something if you have not had direct exposure to that something. At most it would be correct to say that others in your peer/social group like or dislike something.