https://wol.jw.org/en/wol/d/r1/lp-e/1993564#h=11:0-13:595
9. How should we react to challenges to our beliefs?
9 Many people will debate for hours, week after week, but not because they are seeking truth. They just want to undermine another’s faith while flaunting their own supposed education in Hebrew, Greek, or evolutionary science. When encountering them, some Witnesses have felt challenged and have wound up having extended association centered on false religious belief, philosophy, or scientific error. It is noteworthy that Jesus did not let that happen to him, though he could have won debates with religious leaders who were schooled in Hebrew or Greek. When challenged, Jesus replied briefly and then turned his attention again to humble ones, the real sheep.—Matthew 22:41-46;1 Corinthians 1:23–2:2.
10. Why is caution appropriate for Christians who have computers and access to electronic bulletin boards?
10 Modern computers have opened other avenues to bad association. Some commercial firms enable subscribers using a computer and a telephone to send a message to electronic bulletin boards; a person can thus post on the bulletin board a message that is open to all subscribers. This has led to so-called electronic debates on religious matters. A Christian might be drawn into such debates and may spend many hours with an apostate thinker who may have been disfellowshipped from the congregation. The direction at 2 John 9-11 underscores Paul’s fatherly counsel about avoiding bad associations.*