Balu,
It does mean if you see a member guilty of bad etiquette in closing threads then stop helping them
Many of the one-time posters who never return can end up asking FAQs or training/basic questions. In those cases, Alert Moderator for failure to search
Rewarding bad behaviour doesn't help (not accusing you of that) but it's a side product of being helpful to someone who doesn't know how to show appreciation.