What is your stance on it? Some people don't mind it at all, while some others will never purchase a game that has mosaics in it. Normally I tend to fall into the latter camp, especially when it comes to nukige. I don't see at all the appeal of censored nukige when the main point of the game is to get your rocks off. I would never in a million years buy a censored nukige. For moege I guess it depends. On the one hand, the porn isn't necessarily the main focus, but on the other hand moege are a dime in a dozen with very cookie cutter plots and characters, so I don't see much of a point in reading a moege with censorship over one without, unless the story is somehow a cut above the rest (like Konosora maybe). I might break the rule if we're talking about kamiges since those usually make up for it with the writing. I'm thinking on getting the Grisaia series despite the censorship because I hear they're good.
Also, I was wondering why these eroge don't use black or white lines like they use in doujins? I find those much less distracting than mosaics.