from what i have learned, the "Peace" symbol was made by an anti-catholic communist who hated Jesus and all religion and believed killing them off was the answer....doesn't sound very peaceful to me,
the peace sign is an upside down broken cross, and despite what people "adopt" it as, it's origins are still evil,
as i've researched the "peace" symbol time and time again, it's origins are always a controversy, and to be honest i'm not even 100% sure that the history i've read is true(meaning i'm rather open minded about it), but out of all the stories i've heard on it, this one seems to be the most believable, considering it was used even before 1958 for the "Direct Action Committee Against Nuclear War", and was actually being used back in 1945, and unfortunately i just can't remember the name of the guy who actually made the "peace" symbol...it's on the tip of my tongue, but all i can think of is "George" something...
personally i would recommend not wearing the symbol, i personally believe it is bad, and most certainly not Christian, and in my opinion, if you want to wear a symbol of peace, where a cross. or "put on Christ", what better show of peace can you give than to live in imitation of Jesus?
whether the symbol is good or bad, if we are going to give a message by something we wear, it should be a Catholic one,
but anyways, i guess that's just my opinion, so that's all, take care.