There were reports of rapes a couple of years ago on PdB. Most people would obviously be on their guard most of the time and in most places, but one does tend to "relax" rather a lot in Ibiza and let their guard down.
I recommend a bum bag or across the body bag for keeping things somewhat attached to you in the "unlikely" event of not being terribly sober or taking normal care of oneself. Not very fashionable I know, but I attach my phone and wallet to the bag in case of carelessness. I did lose my tobacco pouch one time when I was feeling a bit "carefree".
Why do people seem to like coming onto this forum complaining that others are talking rubbish in such a condescending way? Aren't we all just trying to help each other with tips and news etc? If someone says something that is blatantly incorrect, then is it not possible to correct them politely? In other cases, it might just be a matter of different experiences or different opinions.
Anyway, I heard that some women had been raped on PdB beach (in the early morning I think), so I bear it in mind. Places full of tourists do tend to attract some shady characters, so it's as well to be on your guard in the same way that you would be in London or anywhere else in the UK for that matter.