I hate that 'plink' chat notification with infinite rage. The most blessed feature in my opinion is the ability to turn off that audible scar. I have requested before for this setting to be stored as part of site profile so that I never have to suffer that pain when I go to a different computer, but apparently fixing that mistake is not high on the priority list.
I can live with that, I only have hulk smash everything once, then I know to turn it off on a new machine, which thankfully is not that often. It's still wrong, but I can tolerate it being a cookie setting.
At least, I could. That plink noise has evolved into some sort of herpes like virus, I can treat the symptoms but sooner or later, it flares up and I get plinked one more time. Yes, that inbred idea of a notification noise every so often decides to twist my nipples jus one more time and rings through my head. I can't afford all the pens I end up destroying as I spasm at once again being violated.
This has to be fixed. That noise is a curse of humanity and must be stopped. Clearly cookies can not be trusted to keep it at bay. Perhaps it can be reversed to be an opt-in feature for those few people sadistic enough to bring that mess into their lives.
Ideally, that noise would be just removed from the chat system entirely, and the person who first thought it was a decent enough idea ground to death between two giant rollers feet first, slowly enough to keep him alive whilst he hears his bones crushing all the way up his body.