Translation:Even our children have responsibilities.
It's dialect based.
Not many people do it, as not many people have the Standard Dutch* dialect.
Here in Noord Brabant the closing N is sounded when trying to speak Standard Dutch. When going all out dialect though, good luck understanding what we're saying, and the closing N is the least of your worries :p
*Formerly known as Algemeen Beschaafd Nederlands, but it was changed in the 70's as the name implied the rest of the Dutch speaking world isn't civilised. The abbreviation (ABN) has stuck though, and is still in use by the Dutch population.
It's a dialect/preference thing. I found this map from 1949: http://www.meertens.knaw.nl/projecten/mand/CARTafbeeldingen/holn.GIF