Any particular airlines or airports? I've flown from Frankfurt to Amsterdam without checks (they have automatic gates for boarding cards at security and the gate on both sides). In the case of outgoing Schengen flights for amsterdam there is for sure no police ID check (unless of course you fly outside of Schengen).

Airline crew did check my ID last time flying to Italy with Vueling (at the gate), but this was not a border check but just a name-check with the boarding pass.