@neobrainless – not a needle for starters unless you choose to go that way. Mine’s a 6mm teflon tube that I can’t feel. Also for it to be ripped out, someone would need to get hold of the tube. Simple fix would be to wear a sports bag (think bum bag but not as lame) around your waist/upper stomach with pump in it. That means only 1″ or so of tube is exposed, and that would be half way up your stomach. If that’s visible to the outside sweaty world you need a larger t-shirt size 
Drop me a PM if you want me to send you a pic of my rather scary naked belly with a sports bag on to demonstrate what I mean