First, I don't mind that there are some limits on some things on a site like this. It's a privately owned website - not the government or something associated with the government (like, for example, public schools). Depending on the newspaper, even newspapers can have standards about what they'll published.
For me, personally, there's no issue/subject that I have anything to say about that I can't say (and say well) without violating HubPages and/or Google's policies that place some limitations on some things that people write (and people pay money to have their ads on). Nobody is telling me I can't write about those few things that are prohibited - only that I can't write about them if I appear to be promoting them on this site or any site that has Google ads along with my writing.
Separate from the matter of subjects, there's the matter of "crudeness" and/or profanity. I'm not someone who expresses myself crudely even in dealing with people closest to me, so I'm not being "suppressed" in that way. As far as the occasional urge to utter a profanity may go, profanity isn't welcomed in a whole lot of environments (such as some workplaces), so that doesn't bother me either. There's a time and place for some things, and the person who has some version of a professional image or reputation he'd like to maintain usually understands how rampant profanity in one environment or another can seem to change the whole "culture" or "professional environment" or "positive environment".
Then too, there's the matter of wanting to be socially responsible where young people may see something. I have kids (grown now), but I still care about showing them (or other people's younger kids) that a whole lot of free expression and discussion can go on without being crude. In fact, sometimes crudeness can over-shadow what would otherwise be a solid, legitimate, set of ideas; and not be taken as seriously. (A high-school teacher once used to say, "Profanity if the crutch of the verbally crippled." I tend to agree with that.)