Wasn't calling of difference.
Yes, I can buy a guard, or call guards back - and there will always be someone whining about that - note, OP.
As well, I have a lot of colourful curses thrown at me for running through Underbelly to hand-in the lab quest, just to run out, if even bubble and mount because I can't be bothered at that moment.
The only difference is...
The sewer people whines because they can't get a chance/fast enough/good enough to get a kill. The surface people whine because the sewer people act like hungry animals when just one foot appears beneath the steps. Only difference is, territory. Sometimes people have to go down there, and sometimes people linger there.
I wasn't talking against the use of bodyguards or the PvP in the sewer, but doesn't protect me from the lovely painting of behavior from people when guards are called.
- - - Updated - - -
I honestly don't understand either, than again, there's also complaints from the sewer when they can't gank you.