Our minds decay soon after death, despite some cursory electrical activity after we die. What then? We also need oxygen for our brains to function on anything resembling a normal level, which we wouldn't be receiving in death. How is the brain doing anything resembling life, much less heaven or hell, in death? Actual mechanisms please, not philosophical wishing.
Also, a brain simulating hell in death (even if such a thing were possible, which is almost certainly is not) is no different than a brain simulating hell in life. Even if your premise were correct (again, dubious at best), it wouldn't validate an actual heaven or hell in any colloquial religious sense.
Truth is, people just have ideas like these, all kinds of people from all walks of life. I hate addressing them because I usually end up sounding way more scathing than I intend to be. Or rather, I do intend the logic of my rebuttals to be scathing to the initial point, but apparently my tone and approach leaves something to be desired. It's hard separating personal beliefs from personal feelings toward others, so it's easier for most to take offense to attacks on their beliefs than it is for me.
Long story short, I guess I want to absolutely lay into ideas I find absurd without having to deal with the social fallout from friends or acquaintances. It would also make discourse easier, since it would be easier to engage in debate and find those instances where I'm wrong (because they do exist for all of us, we often just aren't challenged in the right way to expose it). But alas. I suppose that's part of the appeal of internet forums. Anyway, sorry there Leonard...most of that wasn't aimed at you specifically. Your post just got me to rant a bit in general.