Wow. Citation needed, please.
We all know that anything that paints Apple in a bad light travels faster than the speed of said light and generally gets picked up by a dozen news outlets, no matter how rumour-esque it is. So it ought to be some traces of Apple taking legal actions against people reporting security issues against them, no?
Some claims do have to be called out and this might have be one of them. An indication that it doesn't match your experience and that you have done at least a cursory search before requesting the citation would be less likely to be downvoted.
I don't think this is accurate, is it? I'm not aware of any security issue where Apple has tried to criminalise the reporter. I'm not even aware of an issue that hasn't been 'accepted'.
For that matter, I've never seen any of my friends in /r/netsec have difficulty either.
Slow to respond? Perhaps, if they receive many reports. Outright ignore or invalidate real flaws? Never seen it.
Do you have a data point to back this up?