Game development especially has a lot of well meaning customers who haven't got a clue what they're talking about (a lot of kids). Whilst he probably should have listened, it's understandable why he may have dismissed a random on twitter.
The guy took a stack trace of a segfault. If a guy comes up to me, tells me I have a glaring security flaw, and shows me a stack trace of my own code to prove it, I'd be an idiot /not/ to give him at least a few minutes of my time, no matter what community he comes from.
