The wooden heat shield
No. xkcd: what-if #28 explains why.
As it turns out, wood paradoxically makes a good heat shield for reentry. China has actually employed wooden heat shields.
The way wood burns is not that the solid material that we all know as wood, and that gives us splinters, is burning. Instead it is gasses that are coming off of the wood is what are actually oxidising and making those pretty yellow/orange flames. To get those gasses, you need to heat the wood until it boils. (*)
This is the reason it takes so long before a bonfire/fireplace catches; why it is easier to light up thin splinters compared to thick logs: because you have to heat up the whole piece of wood so that the parts underneath the surface do not soak up the heat that is trying to boil the surface to keep the flames going. The little amount of heat caused by the first flames is not enough to heat the wood underneath to make that give off more gasses. You have to heat the whole piece of wood to near boiling temperature until the heat of the flames is enough boil more wood and make the combustion self-sustaining.
The problem — for you — is that the charring and outgassing of the surface of the wood during the fiery atmospheric re-entry is actually protecting the wood underneath. The gasses and their combustion products act like a gas shield that will protect the uncharred wood from the compression heating ahead of the wood. Also — and this is the crux — the burning gasses blow away so fast that the heat from the combusting wood gasses does not aid in heating the wood underneath. The "flame" is simply not there... it is far behind the spacecraft.
Also you have another problem in that firewood logs are very light compared to their surface area, compared to — for instance — the space shuttle. This means the firewood will lose speed a lot faster once it hits the atmosphere, meaning that the compression heating of the reentry will not be acting for as long on the firewood.
Then — as you said — there are control issues. You need to make bits of wood fly in a manner that makes them land with precision in your fireplace. Atmospheric disturbance alone is enough to make the bits rain down in a spread pattern. And any irregularity of the wood will make it veer from the ideal path you want it to take. Logs — with their long not-quite cylindrical shape — are not aerodynamically stable; they will tumble and flop all over the place. As we have seen with other things that have fallen from space; even though the parts initially had the same velocity vector, they will spread out. The tragedy of Space Shuttle Columbia, showed this even clearer.
Speed — as it turns out — is not that much of an issue when it comes to landing the pieces safely instead of just making a huge crater. The bits will fairly soon be subsonic and will not smack down all that hard; surviving debris from Space Shuttle Columbia showed this. However that also means that you have very effective cooling of the previously charring, smouldering wood pieces, which just compounds the issue of the logs not being hot enough to boil and burn.
So in short (again): No.... tossing down bits of firewood from orbit will probably not work. They will be charred but not on fire when they come down. And you have no way of making them come directly into your fireplace lest you make them little remote controlled vehicles.
Would be awesome though, I agree. :D
Speaking of things that fall from space: if you could achieve such precision as to land an unguided space object in an area the size of a campfire, the military would be very interested in speaking with you.
"Say.... would you mind showing us how you did that? We have some... practical applications for that sort of thing"
This in turn risks mooting the whole thing, because you asked for a "[stupid] and [not] practical" way of doing it. Something that is stupid, but that works and that has practical applications is not wholly stupid. It is only stupid for the particular context of lighting a campfire.
(*) This is not entirely accurate, wood does not "boil" like simple substances, like water or nitrogen.
The process is called pyrolysis.