The biggest risk with online discussions is that you might inadvertently place yourself in danger by revealing too much personal information about yourself online.
You should always follow the basic rules for online safety and Netiquette (online etiquette).
It can be very difficult to get a post removed from a Newsgroup or Forum so be careful what you write.
Communications Division Broadcasting & Telecommunication (Quality of Service) Regulations Consultation Paper :: Radio Communication Interference Complaint Form :: National Frequency Band Plan - 20 - 3100 MHz Using a cell phone to send and receive text messages and/or images, is very similar to using e-mail or instant messaging and some of the same safety rules apply.
You cell (mobile) phone can be a direct link between you and spammers, scammers, identity thieves, online predators and cyberbullies.
It is vital that you run up-to-date antivirus software and that you regularly apply security patches to your computer.