Surely we can all agree that whilst it is impractical to have airport style security at all railway stations, bus stations, bus stops etc. It surely would be a good idea that airports, seaports and International Railway stations in the UK at least have x-ray and metal detectors at the entrances to these places, and also as in Dalaman before you clear immigration.
I do fail to see why anyone should think that is a bad idea. No doubt the airport companies would squeal about lost revenue from the rents that they charge the owners of any shops that are not airside, that must be a price worth paying. Especially as Gatwick and Heathrow at the moment seem to have a bottomless pit of money to slag each other off, about where the new runway should go.