Dapped both posts but if OP is focused on broad, index tracking ETFs then he would not really be going against Bogle's advice.
With that said, @Panther both ETFs and Index funds are pretty hands off. I trade ETFs but my long term investments are all Index Funds. Many brokerages waive commissions on a list of Index Funds and if you open a Vanguard account, you don't pay commission on Vanguard Index Funds, so I just have automatic contributions to buy Index Funds monthly for free. That is not a possibility with ETFs