MMETZ:
You sound decisive. Let your instinct and your conscience be your guide! The forum will continue, life will continue, even you will continue.
It's just a forum, nothing more nothing less. Don't lose sleep over it. Every day, in your basic interactions with human society, through school, work, recreation, you are going to encounter people who communicate dangerous information/behavior.
Leaving the forum does not change the number of "ungodly" unbelievers you will meet in life. They are all around you. Relax, settle down, take a chill pill, have a coke and a smile and forget about it.
If you believe in GOD, I am sure your GOD is not watching you right now and judging your future because you visit this forum. THINK!