That woman is acting like an a$$, but she has a small point, though. Anyone can buy 20 tickets at a time, and especially in this situation that's going to lead to abuses. A ton of those go to youth clubs (you see tons of them in the stands at Spring Games), but if a season ticket holder wanted to scalp them he could, and that kinda sucks.
Maybe pare down the max amount you can buy to 10 tickets per account? I don't know if that solves this woman's problem, but it might cut down on some of the scalping.