That's the key for any 2 stroke engine... the problem comes when the jetting is not right and it develops an airleak without you noticing it.
If something blows, I want it to smear down the cylinder and stop dead in it's tracks. Cast pistons have a tendency to crumble and disintegrate before the crank stops allowing piston parts to find their way under the crank against the case and into all of the bearings.
Since you already have it, I'd run it. It should run fine as long as your jetting is right and you keep an eye out for airleaks. I would recommend a monthly air leak test just to be on the safe side and if anything starts to make funny noises, pull it don't wait.
Oh, and a four point siezure comes from not allowing the engine to warm up properly before tearing off on it, the pistons swells tight into the cylinder before the cylinder has a chance to swell from the heat.