.... and of course, what hasn't been mentioned is the effect on the bi-pedal non-native life forms (ie innocent people) when someone has a large dog (or two), which looks like it's ripe for a fight with anyone that gets too close, or looks at it the wrong way. Sometimes the owner seems unaware, sometimes it's on a lead but does not look controllable, and sometimes I get the feeling the owner is enjoying the sense of power from making others feel threatened and in danger. I have for example, not camped at the formal Cox's River camp site on the Six Foot track because a guy had a number of pig-hunting dogs which looked like they were on both steroids and ice - pretty savage looking and untrustworthy, hounds of hell.
The level of fear and worry can be extremely high, especially if alone and without mobile phone reception, and the dog owners should have more consideration for others.
But when you're out there, all you can do is avoid confrontation and hope they are not looking for any trouble.
Skibug