Your heart is in the right place. Sorry, but mine isn't. I think the whole point of air-dropping is to get this thing going in a hurry (a jump-start, if you will). Dumping to foundations, etc. is unlikely to have the same effect. We need people who will spend, invest more, and start using the Bitshares ecosystem. I would argue that we need to find the fastest route to making this the #1 or #2 crypto (by market cap) and that is dropping to people who are more profit-minded and knowledgeable about cryptos. In other words, the holders and users of bitcoin or alt coins. Charities are just going to sell it first chance they get, if indeed they know what to do with it. I say get rich first, then give it away to charities.
This depends on which sort of charity you give it to. If you give it to charities who don't understand technology then of course they'll sell it. Some charities understand technology as well as any of us and already accept Bitcoin. Find the charities which accept Bitcoin endowment and aren't immediately cashing that out, those are the charities you should target.
There are actually plenty of people doing things which involve extremely high technology but which is public funded. I also think the idea to help people who lost to MtGox is a good idea.
It's also a good idea to give to journalists who write good stories explaining DACs or Bitcoin 2.0 technology. Award people for doing good for the community even if they do good by accident or as part of their job. If they have a Bitcoin address and are a journalist who has been writing good stories about the Bitcoin 2.0 community even if they are writing about Ethereum, they still believe the same general concepts and want a better future. Support them and be random about it.
Giving to journalists, either systematically or at random, doesn't seem like a good idea at all to me. It opens the door to huge perceived conflicts of interest. Can you imagine the controversy that would ensue if people found out that bitshares "paid" journalists to write favorable stories about DACs? It would be just too easy for detractors or competitors to accuse bitshares of bribing the press.
With respect to giving to charities, I agree with the previous poster: get rich first, then consider donating plenty to charities later. I think Ripple tried donating to charitable causes, and this probably didn't spread adoption much (although their situation was different--they donated perhaps to offset criticisms about the 90+% "premining").
Let's keep sight of what the main purpose of an airdrop would be: to raise awareness, build a loyal following, encourage people to try out the technology, and attract investors and developers to this nascent industry. What would be the best way of accomplishing this? I submit that the best way would be to target current crypto-currency holders, the vast majority of whom have not yet encountered the new breed of crypto-equities.