I personally am not a big fan of mods (any mods), so banning the subject would not be a personal loss for me. However, I would not ban the subject, for a very simple reason (and a half).
The half first: Who decides which mods are safe enough to be discussed here? I imagine a few discussions about that. If they start, let me know in advance so I can stock up on popcorn.
My main reason why I don't think a ban is a good idea is a simpler one, though: People will do it anyway, and it would be much better if they get the information about how to do it in a place where they get appropriate warnings, too.
Currently, exactly the same game is playing out on a German forum. There, DIY of liquid is striktly a non-subject. The argument is, not just high-level nic juice (everything above 18mg/ml or so) is potentially dangerous, but so are the flavours. That is actually perfectly correct. One really should not consume those out of the bottle.
Only, the result is that a few people are deterred from DIYing – and many just start it, and let's say, people being people, some of those consider ideas like "reading the label" or "understanding what '1%' or '1-2 gramms per Kilogramm' means" to be entirely optional. Sooner or later, somebody is going to have a date with the toilet bowl, and they will be lucky if it's not a date with the emergency room.
As with DIY and flavours and nicotine, most people are not used to the possibility of exploding batteries. It's not something they experienced, ever, nor anybody around them, since it is an extremely rare possibility with everyday gear. And the news that mods, particularly high voltage ones, are possible, is out there, and you won't get that toothpaste back into the tube. So the alternative is, do people get potentially bad information, or do we give them good one, so it is at least as safe as possible, and people can make an informed decision whether to build or buy a mod, and if, which one.
I opt for the latter.
On a related note: How about a poll asking about those problems? "Did you ever have a safety problem with your mod?", "HV or 3,7?", "Switch or battery" etc.