Sitecore flags up empty Alt tags but it still lets users save them without setting the Alt tag. Is there an easy way to enforce that this is done for all new images?
I know I could write a custom validator like so: https://techmusingz.wordpress.com/2014/11/04/enforce-alt-text-for-image-fields-in-sitecore/
But Ideally I'm looking for a way of doing this out of the box with the rules engine or something like that and prevent users saving/uploading images without Alt text.
-- Update --
One problem I've seen related to this is that the standard image uploader in the media library doesn't allow the user to add alt text during upload and so even with a rule to enforce alt tags on save this doesn't prevent initial alt tags being empty on save.
Thankfully I came across this pipeline example which will run on load and add a default alt text based on the image title:
Neat idea but I haven't implemented it yet.
Further info: Sitecore 8.1 Update 2.