For everybody saying:
''It can be photoshopped'' in this thread, (and no I'm not targetting one guy but this is more in general), yes it can be photoshopped but the chances it will happen is so small, let me explain why.
Photoshop is a very good program to indeed edit pictures (or fake edvidence), but it costs money, quite a lot actually.
I mean, for my study I need PS and I bought it in the online store my school recommended, I even got around 40% Student Discount.
Guess what the prize was? 140.50EUR that's right, if you wish to photoshop edvidence it would cost an insane amount of money.
And no it's not just PS that costs 140EUR, it's the package Adobe Creative Cloud, wich gives you like 8 more porgrams with it.
Not to mention every year you need to buy it again to use PS. + With no student discount is costs 240EUR.
And yes, there sure is a way to crack PS illegal or buy is sepperate but my point is that PhotoShop costs quite some money and I doubt people will abuse this a lot when screenshots will be allowed for fly reports.
And yea, there are multiple photo editing programs but that's not the point I'm trying to make.
Back to the actual suggestion:
If people do have acces to PhotoShop or any kind of decent Photo-Editing software it would be abused pretty bad.