Its a simple forum ..any forum..
Some take it personal others not so much.Forums are in many ways a democracy. I belong to a few that make any argument on this forum look like a cake walk..to the extent members were hacking other member's and posting personal information on line..torches and pitchforks in hand.
As far as getting consent..Its easier to ask forgiveness than consent.
Water marks,copyright,can easily be added to any picture with the right application to identify its owner
Theres also application's that a forum can use the would disable the url copy,or downloading of the art work.
realisticly..If a picture was $1000 in small bills, and the internet was a car,
A person leaves $1000 in small bills on the front dash of a car with doors unlocked and windows down..that person really shouldnt be upset when it gets taken ..that person didnt take measures to protect it..The police would not take the case seriously...yeah they would fill out the report..throw it on the shelf and forget about it..a significant portion of the population would seize that opportunity
A basic fundamental of any democracy is the ability to question those in charge without fear of repercussion.
Men have died on the field of battle to preserve this..my humble opinion..It cannot be relinquished on any level..for those who have forgotten history are doomed to repeat it.