Infra dig

It would be regarded as infra dig., I am told, for an American professor of English to concern himself too actively with the English spoken by nearly a hundred millions of his countrymen.

Gradually the hoop fell out of favour. Possibly with the increase in traffic, it was no longer safe to bowl one's hoop over the pavement and it had to be taken into the park. Perhaps it was the coming of the scooter which made it infra dig. to carry a hoop.

I'm a communicator, not a doer. Anyway, isn't it infra dig for a westerner to actually do anything these days?