Is bribe routine of gabala passport control staff?

Is this the routine of few staff members?

Passport control was explicitly asking for bribe from every person of staff and they trap you from both sides so no one else see and then say give anything.

Initially i avoided to reply then the guy wasnt stamping. Keep asking me should i stamp or not? I said stamp. Then he asked again his colleague to explain him.

First i thought they just asked me but then in lounge i saw everyone was saying this and telling stories like these. Also in flight people everyone discussing this.