Are you sure that the wysiwyg editor is not a vbull setting?? and not a gallery setting?
But I think the e-card issue is a philosophical one..
supposed your sister had opened the e-card...
this would meen that a non-regged member could view the large picture!!!
which makes it absurd not letting unregistered not viewing your pictures...
what I would do.. (havent tried it though

)
1. create a category with only ecard pictures viewable by all...
2. disable the ecard feature for all other categories
3. only let registered users send ecards from that category
And ... I would never send an ecard from a place where I new my real email was disclosed.... I did in once.. since that day I receive tons of spam...
Luc