Alpha Coders is a family friendly site. So there are some types of content we don't allow. Your personal opinion of what is family friendly is probably different than Alpha Coder's opinion - and that's OK - you just need to understand ours, so you don't violate it!
The short of it: We do not allow content that is provocative, suggestive, or shocking. We do not allow ANY images from adult entertainment sources.
Provocative covers anything that is sexually suggestive. It can include posing, proportions, and image intent. If an image is intended to be provocative/suggestive, it is not allowed on Alpha Coders.
Shocking covers blood, gore, mutilation, and the combination of all of those things. An image might have variations of all of these and wind up being 'shocking'.
Q: Why the strict rules?
A: Alpha Coders can stay alive because we have advertising on most of the content submitted here. People generally don't want to pay to download a wallpaper, so we need ads. However, we want good ads. Ads that don't give users malware. So that means a high quality ad network. That means that we have to be very careful to only show advertising on family friendly content.
Q: I want to submit content that is not family friendly. What options do I have?
A: Unfortunately submitting on Alpha Coders is not possible for this type of content.
Q: I don't agree that my content was marked not family friendly
A: This is pretty common. The moderator that made the decision will be happy to further explain if you PM them. In all likelihood, the moderator probably shares your opinion, but understands the site rules, and works with them.