As A Christian Do You Try To Speak The Gospel In Other Subreddits?

I'm almost 50 and feel like this would be a great place for me to try to help change the minds of a generation of younger non-believers. But when I look at some of the other forums I don't feel like it would be exactly welcomed and possibly considered as trolling in the Atheist forums. Just curious if everyone is confined to the Christian Subs to speaking their mind? If you do speak out do you get banned or ganged up on?