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specially when you're investing in your travel expenses and you see that the photos you take are being used by someone else,..even when posting on social media like facebook,..that's why i don't photos on facebook and keep all my photos here in steem or in my computer

It would be difficult. I am a professional stock photographer and I have thousands of images that have been floating all over the web on various stock sites and art sites for over 20 years! A bot would be continually flagging me! Thousands of companies have also licensed my work and are using it all over the web! And of course, by work has been copied and stolen all over the web too - including here on Steemit! No, it's up to us humans to find the cheaters!

It will be an endless battle though unfortunately, more especially with the opportunity to earn financial rewards. I think this will be one of the major issiues for steemit, so I really hope it can be controlled for all concerned, other than the friggin' thieves that is!

I think it already is a major issue that will get worse before it gets better, unfortunately.