If a pvp flag where to be added to protection stones there would prob need to be one requirement. Have the player freeze up when entering the area and force them to answer a question that pops into their chat: Entering PvP area! do you want to proced? /y or /n. /y being yes I would like to procede which turns on PVP, and /n being no and they are allowed to pass through the area without having PvP on. But this sounds like another plugin would be needed.
wat if i stack a bunch of ps in a line then anyone that walks into that is gonna be spam frozen with msgs as they try to move
also ps just aren't really a large enough area to pvp short of little duels...
not to mention we don't make the ps plugin so unless it already exists this just wouldn't happen, unless the ps makers decide to implement it.
opti/dej already have their own idea of wat pvp will be, the trick here is finding a way to make use of pvp in the meantime without needing some kinda epic overhaul to the server code.
personally i kinda like the idea of having a sorta bracketed tournament or something as an event, do 1v1 or teams n have a little gladiator style arena to fight in and have some sorta prize for the winners. this could happen once a month or something just for fun, of course pending if it's popular