Well yes u could do that, the problem with that is of course.......... i couldnt remeber the switch to unselect the line :-)
Anyway it should be like this i feel....
Code:
on ^*:kick:#:{
  if (!$window(@kick)) { window -el @kick Lucida Sans Unicode 14 }
  if ($nick == $me) && ($knick != $me) { aline [color:red]-a[/color] @kick 0,1You kicked $knick | sline -r @kick $line(@kick,0) } 
  if ($nick != $me) && ($knick == $me) { aline [color:red]-a[/color] @kick you were kick by $nick | sline -r @kick $line(@kick,0) }
}

otherwise you destroy the line state of other lines (this maybe important i dont know)