Can't you express yourself without cursing? Personally, I don't mind, but I respect the people who do, hence why it is in place. If kids can't control their language themselves, we have to implement the filter so it is controlled somewhat automatically. The rules state don't do it, yet people still do it.
Well, cursing nowadays isn't "I am saying something awful! ha ha!" but more of a way of expressing yourself and emphasizing certain things. For a lot of people, it's not that they can't control their language, but that they don't want to, because allowing those words allows more freedom/depth of expression. Yes, there are people who overuse it, and yes they will be caught. But for the rest of us they have as many legitimate uses as they do immature ones.
More importantly: the wordfilter doesn't really control the profanity at all. When you read a post saying "this cube is ****, don't buy it", you don't think "I wish I could understand that word, but I can't, because it has been replaced by little stars". You think "oh, that means [the curse word it should be]" and you read it as such. So it really does the same thing the real curse would (that is, putting the word into my head), with the side effect of being really confusing sometimes, which isn't really a good thing. Perhaps we could remove the filter, but also automatically flag any posts with more than one curse word, or certain strings ("**** you"), just to make sure anything really bad gets caught.
Yeah, we could easily promote knockoffs and hurt Vcubes quite a lot, but we choose not to.
First: Would we? I mean, this isn't a Chinese merchant's forum; we don't have people blatantly promoting knockoffs with no regard for V-cubes. What we do have is discussions about which is better and about the morality of the situation. I think it helps the community to have those discussions, and to be able to talk about the issues somewhere. We can try to dissuade people from buying the KOs (and we do, since most veteran members do have some respect for V-cubes), but trying to act like KOs don't exist at all would be silly.
Second: Although the "no knockoffs" rule doesn't say it only applies to V-cubes, that's really the case. Nobody is really worried about cubes that infringe the designs of anyone else. If we're going to keep that rule, at least point out how it's used in practice.