I wish that you both had not bought this disabler. I just found out they are only for one character. As long as we stay on the same quests I do not see any problem with exp picked up doing "must do" solo quests or crafting.
It should help keep us relatively close together, we can always turn them off when we don't need them. Yes it sucks that they are per character but I am not paying real money for them. If not this then it would be more bank space.
I have been doing some reading while the ball games are on and it seems it is liberating that you can play that character without worrying about gaining exp. such as working on deeds and such...hint, hint. I may get one myself to solo the deeds needed.
It didn't use to be such a problem, just don't do quests and don't kill stuff. Now there is XP every time you do a crafting action and every time you harvest something. It doesn't seem like much but adds up. The Yule Festival was a real killer. Some of my characters gained a couple of levels.