Just do what you can get to and leave the rest but always make a point of telling, or try to tell, the person who is responsible.
My experience in the past is no one will really bother or notice and if they do, just explain it.
To put it bluntly and no insult intended, to them, you are just another cog in the wheel.
There's also the question that should you move stuff, and a customer falls over it, who is responsible? Said in the right way that usually settles any possible arguments quite quickly.