These issues come up once in a while, for example
HERE, and I feel the star rating should be changed to a simple boolean (unrated, high rated) for the following reason:
It is not clear what the criteria for the stars are, and they mean different things to different people.
While one person thinks that:
1 star = excellent
2 stars = ...
3 stars = ...
4 stars = extrordinary,
Another user might think of 1 or two stars as insulting, and assumes a scale according to e.g.:
1 star = poor
2 stars = ...
3 stars = ...
4 stars = extrordinary
Personally, I believe that even 1 star is already a thumbs up" or "encouragement", while others think otherwise. If the graded star system should be retained, the meaning of each level should be clearly defined, e.g.:
1 star = A good, short, answer that guided me in the right direction.
2 stars = As above, but it included more technical details and maybe a useful link.
3 stars = ...
4 stars = As above, but the answer also included a complete VI that immediately solved all my problems.
... you get the idea.