Woooow there now. That is quite an amazing and silly comment. Encouraging dirty play on the field is not clever and is definitely not smart.
You can be an enforcer but not be dirty ... its all about physical presence on the pitch, the hard running into a tackle, the hard hitting tackles, the clearing from the rucks, the presence when the going gets tough ... that for me makes an enforcer not someone who goes round throwing cheap shots, gouging ... etc and looking to hurt someone quite badly and take them out of the game.
In more recent times Bradley Davies is the big presence in the second row and is Wales so called enforcer, for Ireland O'Callaghan is the boy. You can be a physical force aka Jerry Collins or be a thug Botha. It does not sit well with me someone saying that players should be dirty. You can be physical without being an enforcer.