You're so vain you probably think this post is about you

Patton Oswalt has this bit that I don't remember verbatim, but it is something along the lines of,
"We don't have to respect people's opinions. We have acknowledge people have opinions that may be different than our own, and if those opinions are stupid, then we have the right to tell you so."

Every time a tragedy like the one in Boston occurs, many people see a flurry of posts on their Facebook, Twitter, etc. offering prayers, condolences, positive thoughts or what have you for the victims.

You also have people posting insane opinions and asinine theories about what happened, believing their version of events if the one that is probably true. Or they believe that this isn't tragic because something more tragic happened somewhere else, and we should pay attention to that.

Let those people feel free to post whatever their crazy minds concoct about this particular tragedy, but remember, you don't have respect them.  Just acknowledge that they have their own wacko opinions.  And just like they can have those opinions, you also have the right to inform them they are probably a crazy person.  But don't let them get to you.