This is starting to get really frustrating.
The problem
People are down-voting valid solutions and questions.
Examples
How to install ldap module for php 5.5.9 for Ubuntu?
The author in this post asked how to add support for LDAP in php 5.5.9. According to Ubuntu, there is no "native" support, and their library for 5.5.3 only works with 5.3 . Both the question and workable solution were down-voted.
Get nearest values without loop in array using PHP
The author (myself) of this post asked how to get adjacent elements in an array (closest), where the array is non-sequencial and may have very large gaps between key values. The solution I provided is very thorough and covers both methods of return.
Summary
In all cases thus far, none of the "answers" that were not down voted have any substance or even come close to a working stable solution to the OP's question being asked.
Secondary problem with this, is that users can not "up-vote" or "down-vote" an answer unless they have at least 125 rep which essentially means that people are just down-voting because they can. I think it would be a GREAT idea if some accountability were set on down-voters such as forcing them to enter in a reason as to why they voted the question or answer down, and to have a reporting system in place for invalid down-votes as this ruins the reliability of the site overall.
I do not see any direct way to prevent this from happening. Perhaps someone has a solution or can give some insight as to why people are deliberately defacing this site ?
If someone down-votes something, you should not lose "rep" for it.
that would be horrible. What meaning would voting have then at all?