If you arrested every person who lied the jails would be filled.

Where would you draw the line? Is it wrong when asked how ones day is going and the reply is positive when in fact the day is bad?

For example should lying for the personal gain of impressing or gaining friends be banned? It is morally questionable but people do it every day.

If they wore medals, all of them should have been tried, before court:

https://www.youtube.com/watch?v=ol5Dfs7jqFI