I say keep them. To me, it's like a lighthouse that says, "Hey! Come here for some great hentai!" I mean, you guys have some of the best tastes so it only makes sense to keep them for others to know who worked(in any ways possible) on some of the best doujinshi around.
To be honest.. I've never noticed the watermarks so it's not a big issue for me. Now that I know there actually are watermarks I vote Fakku should keep them. Partly because I (can't) see them (?)..and because Fakku is awesome.. or something haha..!
I like the Fakku watermark. It doesn't detract from the picture yet it marks the scan and makes sure that people can not claim false credit for Fakku's work.
at the bottom right of every page, there's the word FAKKU. It's there on every doujin they translated except there most recent one. The poll is weather or not to remove that.
in all truth since the watermark is so non intrusive keep it!
As long as your not deliberately putting them in places that piss people off i say go for it!
Also all you guys at the top deserve to protect your hard work...
I have had my work stolen before... I know your reasons ^_^
The watermarks are not disturbing in any way while u'r reading the manga.
I think you guys deserve to keep their own quality mark on your way even its not a watermark. But the point here is to keep watermarks or not. Just keep them you did it you get credits for it, That's the way^^.