No I do not. I have heard many comments from collegues that there was no way they could do what I do.
Treatment really does vary as much as individual vary. I float to many facilities from hosptials, to clinics, to health fairs. I am usually treated very well. Often the regular staff is pretty quiet and I need to be assertive in asking for lunch, break, help etc. To me, this is pretty normal, we as humans tend to gravitate to what is and who we are familiar with.
I have never been told anything like you have said. My demeanor is such that I doubt anyone would say something that harsh to me. I am rather clear on who and what type of nurse I am. The facilities I work in are very used to having agency as part of their regular schedule and are very grateful for the extra hands.
I will only speak for myself and my experiences. By and large, I am treated better then when I was regular staff. I do not get sucked into the gossip and politics of regular staff, if I do not like the way I am treated or the work load, I speak up and if it does not change I do not go back to that facility; for me, it is all about choices. I choose to work in positive and stimulating environments.