What are tthe negatie emotional effects on enabling children and young adults

This almost sounds like rhetoric, as you've pretty much answered your own question.  "Enabling" has a negative connotation, and of course utilizing this term in conjunction with our youth is hearsay.  One man's snails is another man's escargot, right?

Unfortunately, times have changed along with technology and issues. While our youth hardly ever utter "No ma'am" or "Yes sir," they have many strains adults today have no concept of understanding from technology, drugs, to growing up in single households. 

In comparing generations, this is like comparing marshmallows to football.  Things of importance 50 years ago have been replaced... fuel injection as opposed to a crank-starter.

First, I don't think you were asking about fuel injected engines when you asked about enabling children.  Whether today or 50 years ago - the results are the same - the more you enable children - and I assume you mean a lack of discipline the more difficult it becomes to reign in an unrully child.  Parents who don't have any sort of discipline in place, will suffer the consequences as the child gets older, and so will the child.  I've been caring for children for over 50 years and have seen the result of undisciplined children.  Many parents, especially those whowork, seem to feel that they simply cannot punish their child because of the guilt they feel about not being at home with them so the child learns very quickly how to manipulate their parents.  And, they learn that no discipline will be forthcoming.  You MUST begin a regular form of discipline for behaviors that both parents agree will not be allowed.  Explain them to the child and also explain what the consequences will be if the rules are broken.  There must be some very definite consequences - loss of a favorite toy, TV time, video games taken away, that sort of thing.  If they are young enough, the "time out" chair will work wonders.  The negative effects of NOT properly disciplining your child will lead to a very unhappy household for the entire family.  You send a message to your child that the world revolves around them and they can get by with whatever they want.  They'll be in for a very big surprise when they enter a world that does NOT revolve around them. Never send a child to his room for a time out - there are toys, games, etc. - put them in a specific timeout location.  Start disciplining NOW - the longer bad bahavior is tolerated, the more difficult it will be to change later.