The only reason I can see that people would be against the toggle idea is if they want to use the forced emotes to harrass other players.
A toggle would require extensive investment of developer time and testing. A toggle isn't even desired for the majority of players. It's only desired by a small minority of forum posters. Therefore it would actually hurt lotro for something like this to be made since it would be taking away from development of things the entire playerbase would need.