1. Only those websites get affected who building one type of backlinks i.e either profile backlinks or only web 2.0 backlinks or only blog comment backlinks etc.. 2. Those websites get affected who Target only 1 keywords in all backlinks. 3. Those websites get affected who did not maintained ratio of creating backlinks, some day creating 1000, some day 50-100 or none. 4. Those websites get affected who Getting backlinks from deindexed websites. 5. Those websites get affected who Did not build backlinks for their backlinks. i.e tier1 backlinks will target your main websites, so you should build backlinks for tier1, tier 2, tier 3 now on. 6. Those websites get affected where No follow and do follow backlinks ratio is not good. 7. I personally think that facebook likes also decrease ranking. Twitter tweets are good. If you all maintained all above, then i am sure, you will not get affected by latest panda, penguin updates.