No, but if you threaten someone in a big way, or post illegal websites, then yes you will get arrested.
people getting free DVDs and someone getting arrested
Yes you will because you need to ask them before posting something that they might not like. If you are mad at someone then do not post anything mean. Just talk it over with them.
Someone who does something gross and illegal
yes it's very illegal, not only is it invasion of privacy but it's pornographic or nonconsented posting on the internet. someone can serve some serious jail time for that.
Unless you are a doctor, ABSOLUTELY. Dispensing medication with out a license is illegal.
If you are convicted of a crime while in the country illegally, you would be deported and then not allowed to apply for naturalization.
A claim that someone has done something illegal.
A hobnocker is someone that does something illegal and gross
Why would they be? If someone is arrested with illegal drugs traceable to a specific doctor, the doctor would probably eventually find out about it, most likely when the police come to arrest them for overprescribing.
Well you could be arrested if the other person presents some type of evidence that you stole it then yes you could be arrested.
sell weed, beat someone, slap a cop, kill someone, and do something completely stupid.