It is a great tradition that should be limited to Wrigley Field .

Other fans see this and copy it by simply chanting at the person until they throw it back . Peer pressure ... you have something I wish I caught...so Im going to bully you into throwing it back. Simple as that.

Some take it too far yelling insults , vulgarities and like Dave M said sometimes take matters into their own hands getting physical . Obviouslythose people should be tossed out if not arrested .

After saying all that ... I must say it is FUN to throw a ball back ( fake ball of course ) Im not going to hit a player and usually it makes good entertainment / tv . Anyone see the Reds players studying the throwback in the dugout last week that was suppose to be Phillip Ervin's first MLB HR ? Well that ball was a little to good .. oops .. not the usual crap I throw back.

Even Dave M used to get in the fun by writing notes to the players on the throwback ball .... remember Dave ? Bring back the brown cubbie bear arm patch ? lol .

Even if you ban it like at some parks fans will still bow to peer pressure ... you are NEVER getting rid of it