Earth-grazing asteroids as a military resource

The latest New Scientist talks about asteroid 2024 YR4 being downgraded from a 1 in 32 chance of hitting Earth (the 17th February estimate) to a one in 25,000 chance on the 24th February.
It's some where between 40 and 90 metres in diameter. Presumably there are more smaller asteroids (which will be harder to see).
Eventually some military clown is going to get the idea finding a few of them and sending up stick-on ion drives, so that the earth-grazing orbits can be shifted into earth-impacting orbits.
A couple of them hitting Russian occupied-areas of the Ukraine would upset Putin no end.
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Bill Sloman, Sydney