I lived for a spell in Leeds and saw a lot of this team at the time.
If opposing teams rolled over , they'd pretty much leave them alone.
However, if they looked like they would give Leeds a game, then the dirty tactics would be employed.
The Spurs manager Bill Nicholson told his players not to go in for 50/50 tackles with Leeds as the Leeds players would go in high and late.
Giles was one of the best midfielders I've ever seen and didn't need to engage in the nastiness.
He claimed to have got done early in his career and got a broken leg.
Thereafter his mantra was 'get your retaliation in first.'
Obviously the game was more physical back then , but Arsenal are the modern day equivalents of Leeds within the current rules.