Law enforcement can use social media to place people at places at certain times, and you'd be surprised how many people have incriminated themselves using social media, like Facebook.
Yes, in every state they have pomeranian police dogs they are used to catch criminals or sniff out drugs they quit using Pomeranian police dogs in April 13, 2011.
Facebook does not do background checks on individuals, so anyone, including criminals can gain access to Facebook. If they become aware that someone is using Facebook for criminal purposes, they will terminate the account but the criminal can just start up another account and continue using it. Convicted criminals can also be banned by a court from using Facebook for some period of time, but even so, those bans can be difficult to enforce since it can be hard to know what a person is doing at all times when they are on probation, out on parole, or otherwise not locked up. Those who are incarcerated may or may not have access - depending on what access they have to computers and how the filters on any computers they have access to are configured. Some places will block Facebook to protect those outside from the criminals. Others choose to allow it to give the prisoners some kind of social outlet.
There arn't really any cons about this question. The pros would be that a million people have facebook and if they see a mug shot up on facebook then there has to be someone that knows the person.
DNA analysis is a more exact science than the other older methods used to catch criminals. DNA can only belong to one person.
You can't enjoy Facebook, Facebook is a noun. People enjoy USING Facebook :)
You cannot access Facebook account using Gmail. You have to use it using the Facebook site only. Gmail is just for confirming the account.
Facebook started using hashtags in 2013. Many people like to use hashtags on Facebook and Twitter.
yes you can login using mobile number in facebook on the main facebook login page.
Yes, you could before, using Habbo Hotel's Facebook App, but since Facebook's Updates on Dec. 9th, you can no longer buy Habbo Credits, using Facebook Credits.
Log in using Facebook.
Perhaps probation with certain conditions prohibiting such criminals from using calculators.