That's why you guys have a premium option( if you have premium) :
"In addition, a lot of new enhancements have been made to the game that will make your life easier. Amongst other features, we have added useful pop-up windows with important infos. You can also rename reports, attacks etc. for a better overview."
So, if you are having false attacks, you can rename them as falls so that others wont give it much attention etc.
So I dont see the need for BoE to be able to hde attacks, when players can rename them, almost as they have the option to hide them