It looks like share.php from facebook isn’t worklng anymore with customized title,url,image ect.
More info here http://stackoverflow.com/questions/22065179/facebook-sharer-title-and-summary-customization
They suggest to use a different approach https://developers.facebook.com/docs/reference/dialogs/feed/
However that needs an app_id
If I use an app_id in my plugins it can be abused and if I let my plugin users first create an app_id and then add that to their plugins that will be overwhelming for some users.
Does anyone have a better idea ?