As we've seen on the news (???) quarantine restrictions have been imposed on returnees from some locations abroard but don't you think all foreign travel should be stopped worldwide to prevent further spread of covid-19 in a "second wave"?

There's lots of complaints about quarantine being imposed on returnees from Spain but it wasn't done without good reason:-

https://www.walesonline.co.uk/news/uk-news/10-brits-tested-positive-covid-18674402

The worldwide spread of the virus was caused by foreign travellers so wouldn't you think that a complete ban is a good course of action having the benefit of the experience of the original spreading of it?