Three and a half years of owning an Aero and I have not come back to find anything other than people taking photos. I also worried about this a little at first but it has never happened. I do not imagine that most people even consider how easy it is to open, unless it is a lady and she may well lose her fingernails !
I have left it overnight in semi-lit hotel car parks, in multi-stories in London during the day and evening. I have left it on street parking in a lot of places and never had an issue.
I am more worried about forgetting to put the clips back on if the battery charger was attached. I have driven off with them unsecured and find they start to lift at about 60 and even then it is only a flap not a smash.
