Seo Master present to you: 
This script allows you to 'Like Bomb' a Facebook friend, or 'Like' everything on their profile page and flood them with notifications. It's a good way to show that special someone that you like them a lot. Several times over. A link should appear above the "Post "box. 
 Works in Firefox and Chrome.
  
 Before hit Like Bomb : 
  
 
  
 After hit Like Bomb:
  
 
  
  
  
  
 Click here : Install
  
 
 
 Script: 
// ==UserScript==
// @name           AutoLikeBomb
// @description    This script will add a link to your friends' pages to "Like" everything on their profile page and flood them with notifications. Now updated for Timeline.
// @author         Mark ReCupido, Brian Ciaccio
// @namespace      AutoLikeBomb
// @include        https://www.facebook.com/*
// @include        http://www.facebook.com/*
// ==/UserScript==
window.addEventListener("load", CheckForLikeBombLink, false);
window.addEventListener("click", CheckForLikeBombLink, false);
function CheckForLikeBombLink()
 {
 var likeCount = 0;
 ProfileActions = document.getElementsByClassName("uiList uiListHorizontal clearfix fbTimelineComposerAttachments uiComposerAttachments");
  if (ProfileActions[0].lastChild.id != "LikeBomb")
  {
   ProfileActions[0].innerHTML += "<li class=\"plm uiListItem  uiListHorizontalItemBorder uiListHorizontalItem\"  id=\"LikeBomb\"><span><a class=\"uiIconText attachmentLink normal\" tabindex=\"0\" href=\"#\"><strong>Like Bomb</strong></a></li>";
   ProfileActions[0].lastChild.addEventListener('click',
   function()
        {
    if (ProfileActions[0].ownerDocument.title == "Mark ReCupido")
    {
     alert('Oh no you don\'t.');
    }
    else
    {
     likestoclick = document.evaluate('//*[@name="like"]', document, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
            
     for (var i = 0; i < likestoclick.snapshotLength; i++)
               {
      likestoclick.snapshotItem(i).click();    
                     likeCount++;
                    }
     alert('Like Bomb Magnitude: ' + likeCount);
     likeCount = 0;
    }
          }, false);
  }
 }
 
  2013, By: Seo Master