If indeed you have heard Him and have been taught by Him, as the truth is in Jesus...
Do Not Grieve the Spirit
Therefore, putting away lying, “Let each one of you speak truth with his neighbor,” for we are members of one another. (Ephesians 4:21-25)
Give it up, guy!
Not every post on CARM is a "life or death matter". Sometimes posters make harmless snarky posts just to have a chuckle or two. I have learned the value of an appropriate emoji. It helps to let the other poster know that no harm is intended in a silly remark.
Do you know how to laugh, or do you consider laughter a sin?