Yes. If one takes a picture of a person without his consent either express or implicit it is amounting to infringement of his personal liberty. He may sue you that you have trespassed his personal life. There are exceptions like public figures who on public visit can be photographed without any specific consent from any quarter.
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In the U.S., it is perfectly legal to take a picture of anyone or anything that is in public or visible from a public place (the only very limited exception to this has to do with military installations, where the prohibition would be posted). People in a public place have no expectation of privacy as far as their image. It may be illegal to use such pictures for commercial purposes without the person's consent, which is usually obtained with a document called a model release. See related link
It is illegal to deliberately take photo's of people if you don't have their consent. In relation to porn it depends on whether the pictures violate the laws of pornography where you live.
If you take the photo, you have the legal rights to them. As long as they do not contain nudity you are allowed to do it.
No it is not illeagl to take photos in the mall.
NOPE
As it was a private event where no press was allowed to take pictures.
yes since there is a reasonable expectation of privacy
Should a minor take nude photos of themselves, this is not illegal. It is illegal for another person to possess photos of minors nude. It is considered an act of child pornography to possess or take pictures of minors or persons under the age of 18 nude or partially nude.
No. Unless it is being used for a purpose that affects the neighbor.
All Runescape private servers are Illegal, if caught Jagex may take it seriously.
Without this right, it might be made illegal for private citizens to own weapons. If the private citizens had no weapons, it would be easier for criminals to take advantage of law-abiding people. It would also be easier for the military to take over the country and much harder to overthrow an illegal government.
People cannot be illegal. It is not illegal to be a parent.
Define what you mean by "private community." It may not be illegal, per se, but you certainly can't be surprised about why such actions on your part would raise questions about your motives.
Because people can take photos of who one and they can also take photos of the number that person had on her card.