Since I was maybe 10 years old, I've never put anyone on my "ignore" list. And I have no intention of doing so.
But there IS wisdom in not responding to false prophets..... sometimes attempting to correct them (as yeah the Bible tells us to do) only gives them an opportunity to shout their lies. I think of Jesus at the Temptation; He did not argue, He simply quoted (verbatim) the WORDS of Scripture and left it there.
People come to a site like this with an agenda (VERY rarely stated). There are many such agendas. One of them is to proclaim some idea they have come up with that is unorthodox and contrary to well-established biblical teaching. They often think themselves uniquely led by God and uniquely smart and uniquely have an individual mandate to present their heresy. SOMETIMES (well, I can think of an example or two) there's enough humility and faith that they can be taught. But often the egoism and individualism is SO intense, SO dominate, that (like Satan) God Himself is wasting His breath and time (they are simply smarter than God or view themselves, unqiuely, individually, as the Mouth, the Voice of God which God must agree with). They believe all must humbly submit - but that doesn't apply to them toward God but to everyone (including God) to them. Such false teachers are best ignored- although I admit and confess I often lack the wisdom to do that.