If booing is such a good thing, allows us to release pent up emotion with no negative impact on the person receiving it, why don't we all boo from the moment they set foot on the pitch at the next home game?
We could greet every pass, tackle, run and move with a chorus of jeers and cat calls, taunt and shout derisive comments for throw ins and corners, sing abusive songs about the players and wow, imagine if the team score, we could really let rip.
That would show them eh?
We'd all feel so much better and the players wouldn't notice anything was wrong as as we know, they take no notice anyway.