If you would like to participate in this forum but are concerned about the possibility that your posts may be traced back to you, then Tails (https://tails.net) is for you. Tails is a Debian-based Linux live CD (or alternatively, bootable USB system or virtual machine).
When you start your computer from the Tails live CD, all your Internet traffic is routed through Tor, an anonymizing chained proxy. And nothing is written to your computer's hard disk.
For more about Tails, see:
https://tails.net/support/faq/index.en.html
The journalists to whom whistleblower Edward Snowden provided documentation of governmental misconduct have been using Tails to protect their electronic communications against eavesdropping, as Trevor Timm of the Freedom of the Press Foundation reports:
https://pressfreedomfoundation.org/blog/2014/04/help-support-little-known-privacy-tool-has-been-critical-journalists-reporting-nsa