People out for posthumous fame forget that the Generations To Come will be the same annoying people they know now. And just as mortal. What does it matter to you if they say x about you, or think y?
Think about this. Marcus has no idea that almost 2000 years later, millions of people still say his name every day. How many people does this apply for? They have no idea. What good then did it do them to worry in their life? Simply do the good work. Let the rest run its course