I think broad education needs to be disseminated regardless. In terms of THC content, you have to define a dose, and the dose depends on the individual and the reason they're using it. Right now, we're talking about non-medical use, so my presumption here is that you have people looking to get intoxicated. You're likely talking about doses that are higher than what potentially would be needed for medicinal uses, but as for what level that is, it's still up for debate and in need of more research.
As any good researcher will tell you, we need more research, but the fact of the matter is there are very few controlled studies of edible dosing with cannabis. What we've found in our laboratories is that we can give the same dose to 35 different people and half of them tolerate it very well and the other half get severely impaired. We have some individuals who vomit after a really high dose, and they consistently get sick when we vary the route of administration. It doesn't much matter if they smoke it, vape it, or eat it: at high doses of cannabis, they get the same types of effects. Some people are more sensitive to those effects than others.
Again, drawing a parallel with other things like alcohol, you can say the same thing. Some individuals can drink six beers and be fine, and others would be throwing up in the corner. How you manage this and how you factor it into regulation is that you want a unit dose that's low enough and is not going to make most people sick. Let the people who can tolerate higher doses consume more but do so in a manner such that they know what to expect and so it's consistent across episodes of use. When you go to the liquor store and buy a beer, the beer isn't 5% alcohol one time and 10% the next if you're buying the same beer. There's variety and there are differences in beer, but it's labelled with the alcohol content on it, and you need a similar set-up for cannabis.