I had a friend of a friend PM me about Vic's car seat - he has a Houdini stop - they told me how bad ect it was. which is fine. but i asked them if they knew about how hard we'd tried to stop him escapeing ect. which they never did reply. so it depends. twisted straps yeah if they where a friend i'd say something or if they turned their baby forward waaaay too early then yes. but beyond that thats their choice.