I have two mini's, one fitted with Falkerns, and the other with Yokos. The Yokos are a softer compound tyre than the Falkerns, and therefore provide more grip, but they also wear that much quicker too. That doesn't make Falkerns dangerous though, there's really no such thing as a dangerous tyre, so long as it's road legal, correctly inflated and free from damage/defects. I've driven progressively through corners and bends on Falkerns, in all conditions and without issue, but then if you are the type of driver who takes bends in too higher a gear, brakes whilst cornering, or doesn't apply power correctly through bends, then Falkerns will undoubtedly be less forgiving than Yokos would.
You really need to drive to the limitations of your ability as a driver though, not just the limitations of your tyres. If you're relying on the compound of your tyres to keep your car "shiny side up", then it's really only a matter of time until you come "unstuck" any way, however grippy your tyres are! If anything the grip of softer compound tyres such as Yokos, can actually give a false sense of security, which can encourage inexperienced drivers to push the car beyond their abilities as a driver. In my opinion, young/inexperienced drivers would be far better off "learning the ropes" on budget tyres with a basic level of grip (i.e. Nankangs), and then upgrading their tyres as their ability as a driver improves.