NSFW pictures are by default hidden/blurred for me now. In case I take a peek at one, then there seems to be no option to make it hidden again to prevent accidental embarassment. May be there is a way to do it in future?
I've noticed on my phone an unhidden image will be re-hidden if it is moved sufficiently off the screen (scrolling back it's hidden behind an NSFW notice.
A workaround while we wait for a blur-now feature.
This would be good as I've accidentally clicked a few as well while scrolling in a NSFW setting. Having the option to quickly blur again with another tap or something would be a good feature.