Newer users sometimes overlook the accepting and voting part of Stack Overflow. No big deal as this mostly resolves itself after they are pointed to it.
Recently, however, I stumbled upon more users who had 0-1 accepted answers (yes, I regularly checked the more than 4 questions whether there was something worth accepting), had 0 votes and didn't respond to comments on both being an integral part on Stack Overflow. As they did usually respond to questions that could lead to solving their problems, language barriers are not an explanation.
Should and can we deal with such users that are "not giving back" to Stack Overflow in some way?
Note: I am not worried about my own rep, most of these weren't even questions which I had answered.