It is usually reported that the electron is a dimensionless point, with no extent. But it has mass. Why is it not, then, a black hole? A black hole with the mass of an electron would have an event horizon, which is not a dimensionless point. If it is a black hole, how does the charge "get out" to affect the outside world? If a black hole were given a charge, e.g. by injecting a stock of electrons, would it respond to magnetic fields, as an electron does, without being able to exchange photons with anything?
Or, if the electron is not a black hole, why isn't it?
An electron and positron annihilate on contact producing a pair of photons, which seems incompatible with their being black holes, unless maybe anti-particles have negative gravitational mass, so that contact gives the pair zero gravitation. Does it make sense to have positive inertial mass, but negative gravitational mass? I don't think that other particles (e.g. neutral, or positively-charged) smashed into electrons are known ever to get absorbed, as we might expect if it were a black hole.
If the electron and positron are both dimensionless points, yet somehow not black holes, how do their paths ever succeed in intersecting? If there is some minimum distance where they annihilate, why isn't that the size of the particle?