I pretty much always do, i know your still probably liable if something does happen but can point out warning signs were out etc.
I have my signs, the stand up ones, in the way of the reel so you have to move them anyway to get to work so i just stick em out anyway, takes seconds...less than. Better safe than sorry...well safer.
I had some idiot once saying "thats dangerous someone could trip" i was working in town on shop front so i said "theres a sign there mate" and he couldnt be more apologetic lol
