So maybe that could be the deal going forward - sure I'll put up $100 to fund your project, but that comes at the cost of you not selling out in the future.
EDIT: Clearly the weight of your vote would be proportional to your investment.
How deep does that go? Change of control events? That would basically mean that a startup would have to disclose that they were in negotiations for acquisition/investment/whatever, with whom, and for how much. That would basically mean potential acquisitions would become public knowledge - it's hard enough keeping them quiet when it's just the startup, their investors, and the acquirer involved.
> That would basically mean potential acquisitions would become public knowledge
That would kind of be the point, it would be about fairness. People may not want to invest in a promising project that could change the world, just for it to be bought up by the next FB/Google.
Given angel investing follows the power law with the majority of returns coming from a small number of companies not having access to the top 10% of the deals vastly reduces your chance of having a decent return.