Hi Ward. You are correct that we delete posts that we feel are part of a campaign by a company or its agents to promote the company's products or to disparage its competitors or their products. it is also correct, as stated in another part of the community standards, that signatures must follow all community standards as well.
The point of item 13 is to delete posts from say, HP to hype up how awesome their printers are or smear the reputation of Canon's printers. The key words here are "by a company or its marketing or public relations agencies". Users are welcome (and encouraged) to post their experiences and recommendations for products. We welcome vendor participation, but we require that they disclose their affiliation. So a post like "Hi, I'm Joe from HP. I wanted to let you know that we have a newer model out..." would be fine, assuming that it's not part of a larger marketing or PR campaign. But just hyping a product without disclosing your affiliation with that product is not allowed. Nor is executing some sort of viral campaign within the posts on our site.
It is common in communities for users to add words or graphics to their signatures to express themselves. We allow and encourage this as long as they don't violate our standards. For example, just like we don't allow profanity, personal attacks, or pornography in posts, we don't allow them in signatures. I don't think that the presence of a Firefox (or Microsoft or Ubunu, etc) logo in a signature makes it part of a campaign by a company to promote their products. It is more likely that it is simply someone enthusiastic about the program/product. Until there is more evidence to suggest otherwise, I choose to assume good will (assume that the person is not trying to break the rules) and that the person is just an enthusiast, not a shill for a product or program.
You also mentioned that you see so many of the same signatures. First, the signature for that user appears at the bottom of every post. So for active users, you'll see it a lot. Second, some of the graphics are very common (the Firefox logo, for instance), are spread widely around the internet (there are several sites where one can obtain signature graphics), or are generated from templates (a plain black bar that a user can insert their own text on). I do not agree that the same or similar signatures automatically constitute a marketing campaign.
I hope that answers your concerns. If you have any more questions, please feel free to send me a private message or to post them in the
PC World's Website section.
Kellie Parker | Online Community Manager | PC World