Again: Grant Hill made an all-star team despite only playing four games. If the question is "who had the least deserving season", it's clearly him, right?
By that criteria, Magic Johnson, who made it in a year that he wasn't even on a roster, would reign supreme.
That was obviously a pretty unique case considering the general conflicted view/population ignorance on the HIV virus at the same. Looking bag it was pretty impressive the league was able to make that appearance happen.