I don't think many people outside Australia will have too much sympathy for Smith, Warner and Bancroft. The Australians have played nasty cricket for a long time; some of their "sledging" has gone beyond any reasonable limits and they've had a lot to say for themselves until right now.
I know other teams have cheated but the Aussies have been a bit holier than thou about cheating - until they've been found out.
That said probably the worst thing about all this is their snivelling, tear stained interviews on TV to say sorry. OK, you got caught. Take it on the chin and move on, don't turn it into a soap opera.