No. It would alienate plenty of people in 10 round limit states who play in Production. It's just a preference by a few people who want to avoid a reload or two on a stage who can easily shoot Limited if they want to load up their magazines.
Now you go.
I think more highly of USPSA shooters in gun unfriendly states to believe that they would be alienated by less restrictive mag limits for matches in other, more hospitable climes.
Then I guess you've never run a match in those states......
No, but I once told a guy from New York hoe I always loaded fifteen rounds in my G19 magazine and got no adverse reaction from him.