[manephelien]

The last point applies to both photo services and uploads to the server. Quite frankly not something I'm overly concerned about.

Uploading photos to the site server is a hassle, and unless you're posting very large pictures, I don't like the additional bother of having to click minuscule thumbnails on other people's posts.

So I use photobucket (and will use thumbnails on images wider than about 500 pixels). Unless you've shared your password with someone else, it's extremely unlikely the picture will be substituted.