Not the edges, since the great gulf fixed between Heaven and hell cannot be crossed by anyone, from either side. I actually believe that the 'location' as it were of the Lake of Fire will be similar in location to those sentenced on the planet Krypton, in Superman writings, in another dimension, which will appear as 'death' to us, since those who've been sent there will never be heard from again and will never return. Evil will continue, since those who've rejected God will never find repentance, they will live under the curse which they have chosen, but that is irrellevant to the life and love of Heaven, the New Heaven and the New Earth, both of which will be un-touched by evil, and will be exactly as God has designed them: perfect. I believe that Satan's sin has reached to Heaven, and that when we see the design of the earthly mercy seat and the sprinkling of the blood that we're seeing a symbol of the real one in Heaven, where Christ's Blood was offered, and Which cleansed Heaven as well as earth of Satan's 'stain' of sin, but since that cleansing will not be complete until every sinner is imprisoned for good, God will then bring forth His New Creation, which will remain perfect, forever. No, the fact that there are those who reject God doesn't cause evil to bring any curse upon Heaven forever. God will bring His Judgement to everything, everywhere, and will put all things in order. Thank God for His Grace, so that we don't have to worry about being punished, for aeons or for two seconds; He gives us Jesus' very Righteousness, and allows us into His Presence, forever; without any infringement upon our reward by those who are punished.