I have to agree on this. Maybe put a timer on it for it to take the screenshot. Also settings so you could modify when it takes the screenshot and where.
1. New players dont duel
2. There are barely any new players these days
About the difficulty of it I'm not 100% sure, I might be wrong there I'm not a game dev.
All you forum users can argue for it as much as you want, but people who actually enjoy and play the game on daily basis would like to get some update too, but sadly that is not happening and staff of course always get what they want because they have a voice in this community. However, staff doesn't play this game nearly as often as an average player so of course you Don't give a fuck about in game changes.
Go ahead make a poll IN GAME if people would rather like to see a visual update of the game or auto screenshot feature and then decide how bad people need it, since your main concern seem to be players.
The reason to care about users getting scammed is that they were cheated out of "their" belongings, its reasonable for young, early teens and before, to not think about how likely they are to ve scammdd on their first duel when theyve never even heard of the forums
Arguments with the word "should" cannot outweigh the statistics.
Perhaps the reason scams are reported less by them is that they dont know about scam reports, perhaps there should be somthing ingame to give them direction to the scam report board - however I dont know how it would be possible to stop that from being intrusive
Why not just have a function similar to autosave where you have an autolog for events and chat? That way players can provide evidence of abusive chat and duel/scam issues, and having it in a log format would make submitting it to admins a lot easier. I'd suggest a scramble/hash (so that users wont have such an easy time manipulating it) on a ID basis.
This further proves that people who are not responsible enough to take a screenshots usually won't even make it to the reports board thus the feature is useless to the majority of players.
Most people will either know everything or nothing about reports, so new players won't even know where or how to report it. It would be much easier and more effective to raise awareness of these scams and remind players to always screenshot any deal or duel with a link to reports board. This could be a message that appears in chat once in a while or something similar.