Just let them be on what they do believe or what they do seem its right because once the reality would slapped into their face then this is where realization do kicks in.
Only if they kept that on themselves it would be more good. But since they are sharing those crap thoughts here about martingale, they somehow annoy the community and we should not just ignore it as we are here to at least guide those who think that 'right is right".
With how easy for them to say things like that, especially the below statement, they really need some serious advice.
"There is no way you will fail 7 times and if you do just increase the bet and you will get it back eventually even if you wait 12 times."That's right. They neither know what they're talking about nor care to try and learn, and they shouldnt be giving advice to anyone. Blatant lies like the above statement could easily jeopardize some rookies that are still inexperienced in gambling and they could lose a lot of money. They might be tempted to believe such bold claims and bet based on these lies.