Letter from David Roth, 4 November, 2016

Neil James (Letters, November 1) claims that ads at the airport are aimed at all citizens, not just military decision makers, and that all citizens have a responsibility for defence matters.

Therefore we should all enthusiastically support weapons ads at the airport.

The problem is that if lay persons like myself or Sue Wareham expressed an opinion on the evaluation of complex and highly technical equipment purchases on the basis of an ad, we would rightly be laughed out of court.

I don't go about telling scientists which cyclotron to buy either.

Such photos do not constitute an "informed debate".

The reason I do not keep up with technical defence equipment evaluations is not due to "apathy, ideology or emotion", but due to the fact that in a free society, I have chosen to study other things.

David Roth, Kambah