Hello, this a feature request mail.
Recently I found a plug-in for nautilus in Gnome that allows sending a file to a pastebin service via contextual menu. I see it a genial tool and it would be great if you could add this feature also to your Pcmanfm.
It would be nice to can pastebin both: text and image files, for instance KDE pastebin widget accept both of them and send the file to its respective pastebin service.