The passage where Jesus talks about praying in secret (in your closet) obviously has to do with not showboating your piety in an ostentatious manner in public just to impress other people.....it's not an ironclad rule meaning you must always be alone when praying. This should be clear to anyone who pays attention to context while they're reading...but who does that when they are only out to trash something?

"Context? I don't need no steenkin' context! I am not here to think. I am only hear to react and condemn, according to my kneejerk prejudices."