I had a scare this week and feel it should be known for others to watch out. I bought a used Ipod and when it arrived, it came with youtube and access to internet with no filter. I thought I was in for it, so I quickly asked someone more savvy than me what to do about it. He blocked the Youtube and removed the "Safari", which is the open internet. He then put on Bsecure instead, which is internet with a filter. Plus, he put on a password which only he knows, so that I can't unblock whatever he blocked for me. I can breath easier now.
For more on filters for handheld devices, see this thread on our forum (scroll down through the replies).