Have you ever been strong enough to change your view on a topic after an internet debate with someone ?

I don't think so. Maybe some additional information gets baked in to the cake but if a "debate" is taking place I think that's predicated, at least for me, as having a pretty firm position driven by facts or experience. I try to not open my mouth unless I know what I'm talking about. And if I don't I'll try to learn first.