The coaster making I went to was. But it was during the day when anyone is allowed in the area. There was a family in another section of the pub playing games, and it was not a problem. It was the selfish mom who thought her little ones should be allowed because "they love doing crafts". Last I checked, there is an area where they can do arts-type stuff in the clubs even if it's not an organized activity. It was just not a good situation - especially when the CM put all the other guests in the position of either letting the kids stay or being "that person" who didn't allow a child to do what she wanted.
If it's time for anything, it's time for Disney to empower their CMs to enforce age limits and not be so overly worried about offending someone. NOT for them to start moving things because some people think they don't have to follow the rules.