Fans have a more emotional approach and it's understandable. I highly doubt the players do. Gronk did something stupid in the heat of the moment, four years ago. Beane literally offered him a contract a year ago, so that is a non-issue
The issue is what it would take to get him contractually and determining on if both he and Knox can play together effectively or if it would negatively impact Knox having Gronk on the roster. That's literally where it starts and ends.