I quit in 1994 when I found out that I had joined, unwittingly. I was a first year teacher and had joined the local city teacher's organization. I didn't know that it made me a member of TX State Teachers Ass., and that THAT made me a member of NEA. When the NEA tried to organize a (failed) boycott of Florida Orange Growers because they chose Rush Limbaugh as a spokesman, it all came together for me and I realized I was in the throes of a union that was using my money in a way I did not approve. I quit the next year.
Thats the way it is in PA as well. If you join the PSEA you also join the NEA.