Just so you know, there are atheist and humanist sites and pagan too I suspect, that have members that join Christian forums just to cause trouble. And in the process to see if the Christians adhere to the scriptures when encountering it.
I've browsed atheist forums and there are those that openly brag about this hobby of theirs.
Welcome to CC. If you find you can't stand something someone is doing there's an ignore function. Just mouse point under that posters name and wait. A little window drops down and there's the ignore member link. Click. Peace is at hand.
Now you may find a school of thought that will say encountering people you can't stand is just a reaction to what you hate in yourself but don't see.
Yeah, could be so.
OR, it is evidence of how much you have grown in Christ. Being selective as to what you encounter and allow to occupy your attention because every moment of your life is precious while you are here on God's mission.
Again, welcome.