Well, the fact that at least technicaly, Israel isn't at war with Lebanon, but with Hezbollah, makes this a tad easier.
I doubt that any Israelis are PM'ing any "liberal and educated" Hezbollah fighters...
Re "technicalities", I'm sure the distinction is noted by folks being shelled or hit by rockets. While I doubt blogging will help world peace, the irony of civvies on both sides chatting during shelling/rocket attacks is... amusing? Sad? Playing the fiddle while Rome burns?
Seems like the kids on both sides just want to live their lives and do the normal teen thing. Not helpful this second, but ten, twenty years down the road it may make a difference. It's slightly harder to hate the enemy when you know them. If you grew up talking to So and So from across the DMZ, you know more about life on the other side of DMZ. You see past the propaganda, past the cultural lines. Maybe it's a waste of time, maybe it's not.
Otherwise it's just going to be kids in Lebanon remembering their home being shelled by Israeli troops and Israeli kids remembering being shelled by rockets from Lebanon. Kids eventually grow up and start running the world. They remember. It continues the cycle. If the cycle is not broke, all the cease fire agreements and peace treaties aren't worth the paper on which they are printed.
I doubt that anybody in Hezbollah gives a ratpill about the opinions of any Lebanese teenager.
Hopefully. Teenagers have a funny way of growing up. If they alienate the youth, less and less will join their cause. Wars are faught by young kids, not old men.