Is shame and remorse unskillful?
The other answer on this site was fine in its essence, spirit, purpose &amp; intent. 

There is the unwholesome 'remorse' or 'guilt' (kukkucca), which is a hindrance; and there is the wholesome 'sense of shame' (hiri), which is a virtue and one of the five gates to Dhamma. 

As the other answer on this site implied shame towards unskilful deeds is for a Buddha a means of learning a lesson and moving beyond guilt &amp; remorse. 

The Lord Buddha said: 


  He who having been heedless is heedless no more, illuminates this world like the moon freed from clouds.
  
  He, who by good deeds covers the evil he has done, illuminates this world like the moon freed from clouds.
  
  For it is a cause of growth in the Dhamma &amp; Discipline of the noble
  ones when, seeing a transgression as such, one makes amends in
  accordance with the Dhamma and exercises restraint in the future.