What About A to the D?

I thought A.D. wouldn't sign up for blogger? Some kind of post-crypto, neo-troglodyte, channeled Luddism.

Or worried about getting too deep?

aka Slippery Slope (legal)

aka Camel nose under the tent (ethnographical)

aka Thin edge of a wedge (engineer)

aka Dominoe Theory (international politics)

aka

Stepp'd in so far, that, should I wade no more,

Returning were as tedious as go o'er.
(literary)