This trend mostly affects the blinky classes where you need to squeeze every ounce of power from the motor. Batteries are better these days, but some packs have exceptionally low internal resistance, which equates to more punch. Normal consumers will rarely come across stuff like that, or pay some ridiculous amounts of money to get it(if you are not sponsored).

If your club races are a bunch of normal guys just racing for fun, it shouldn't be a problem. But once it starts to get serious, the guys with the connections and/or deep pockets will find ways to get that advantage. I guess that's just the nature of racing.