If they want to use it, more power to them. Scripts are nothing more than customizeation- the useful ones anyways. I find it might be slower to double tap, but I prefer the degree of control it gives me to use the double tap. It's more flexibility, which in turn allows the player more control, which in turn allows more potential, which, *breath* in turn allows for a greater possible skill level.
It's all preference.
::EDIT:: I'm always willing to help other players educate themselves on the topic of scripting. PM me to discuss or if you need help with it. There are some... lesser known scripts I'd rather not talk about, however, and refuse to teach people about due to exploits in the HL engine.