Finally, I managed to get into Exhentai and read mrsound's post entirely.
Unfortunately, I also had some free time to think about it and the more I thought and the less benevolent I felt.
In the beginning, I hoped there would be a quick and kind way to settle this issue down, but it's clear by now that the guy won't take a step back, especially if he thinks that I am just reaping what I've sown.
Sure, it's true that I've decided to share my darkest side with Gurochan people, a so-called public forum, but is also true that I've asked for discretion in exchange from the beginning. May be I've been too naive but for more than three years nobody here had problems to comply with this little agreement, nobody ever treated my stuff like it was theirs and everybody knew that the best back-ups were the ones people host on their own drives. I guess it's my fault if I took this respect for granted, but our adventure ends here if I can't count on it.
I apologize to those who enjoyed this ride and kindly complied with my whims. To the others, I won't tell words they wouldn't listen to and couldn't understand. To the admins, you can take down my threads. Someone made a pretty nice back-up out there, even if I think that the term gallery-rip would be more befitting.