Agreed... the sort of pickles we get ourselves in to in Ibiza I don't think its wise going out and not being able to contact your mates.I was at elrow a few weeks back and an inflatable hit my phone as I was recording a video, phone flew flying into the crowd... then some girl picked it up and handed it right back. Got lucky!
The no phone idea is awful, one of my female friends never brings her and while we were at Sonus Croatia she got too drunk early in the night right as we lost her. We didn't see her again until the next afternoon. She didn't even know how she went from point A to point B or what happened to her. Scary stuff, we couldn't even try to call her since her phone was at the hostel the whole time.