Thread drift but still relevant: if you saw a Kangaroo on the runway, would you tell other people in the circuit? By the same logic, their training should be to scan the runway before landing and avoid.
Of course you would tell people to be careful. It's a unique hazard and may save aircraft from being damaged, plus it's just good airmanship to help each other out. Just don't "blah blah" too long about it on the radio.
Same logic for wake turbulence in my opinion.