Actually Tubz - that was a joke. You guys are so serious.
Alright - serious it is.
I agree that a transponder might enhance safety to some extent at airports like that, but I don't believe they should be mandatory.
Ours is a movement struggling to stay minimal. If we start advocating mandatory equipment, we'll get it faster than you can say "ffft".
If you believe it can enhance your particular flying environment, get one and turn it on. I'm quite happy, when flying through Canberra's valley for example, to let Approach know my details, location and intentions. If they ask me to squawk, I say "nil xponder" (it's quicker to say with an "x"), repeat my intention to remain OCTA, and everyone is happy.
If I decide I want CTA when we can, I'll get one. (thank you Cybil Fawlty - special subject "the bleeding obvious").
Cheers,
Ross