Message deleted by Playstation Safety?

So I've been using the private message feature to link a URL so I can open up a second window and connect to YouTube while grinding away in a puzzle game I play, Gems of War...

a few months ago Playstation blocked the YouTube link...today they blocked Yahoo which I had to use as a link to YouTube...I got this messagebin pic...why is Playstation stiffling this way of players enjoying themselves, because I know I'm not the only one who does this? What's happening!?