My favorite is when you give a Christian evidence of any sort and they block you because they lack any counterargument. God is good? Here's a Bible passage about smashing babies on rocks. God hates prostitutes? Here's that part where Jesus washes women's feet with his hair. Nobody understands electricity? Then why don't you stick a key in an outlet? The eyeball is proof of creation? Here's a literal demonstration of how they have evolved multiple times from simple light-sensing cells. Blocked, blocked, blocked, yelled at then blocked.
I could go on all damned day, but you get the point. Blind faith is antithetical to logic, full stop. As far as I'm concerned, it's a psychological disorder, regardless of the object of said faith.