^Bullshit!
I used recreational, small amounts of oxy since I was 15. Until I broke my shoulder I never experienced ANY tolerance/cravings/ill effects.
My father on the other hand will become a whimpering baby after 5 days of use. Everyone is different, but using oxy to get high once in a while is not harmful. Some would say that the way that most people SMOKE marijuana on a daily basis is much more harmful than occasional opiate use.
Depending on how you are planning to take it (I suggest oral, especially for the first time, it hits a lot smoother and in waves whereas snorting it is kinda like hitting your head with an opiate hammer, no matter what it will take a while to recover) it can be considered a safe drug.