Hmmmm, never seen a bike or car for that matter get confiscated for unroadworthiness!!
Only if you had been riding like a twat (Warp factor 10 Mr Sulu!!
) and got sprung, and then of course they take the vehicle! (Hoon laws) But not for things like Zorsts!
I think if you ride sensibly you wont get hassled, although this time of year the
presence will be full on with "Road Safety" being enforced bigtime, so gettin g some licence checks at least would be a given?!
Sounds like a drug/alchohol induced scare tactic by someone!!