So I imagine there will be a bit of Merc vs Merc warfare. 
I'm not exactly sure how that will go down with the white flag rule. 

One Merc team is hired to steal something while another to protect it.
The protectors surround it and put up a white flag. 

"Can't kill us"
"Well get out the way!"
"No"
"Um, please?"

Obviously white flag must also mean defeat and failure?

[b]Edit:[/b][sub][color=ed1c24]Anyone under the mercy of a white flag who continues to or further seeks to fulfil their contract/ hinder another's, voids their right to and warrent of mercy/protection. [/color][/sub]