Whilst I appreciate that the concept behind that type of mining and see the potential in micro transactions through this, then it is an entirely bad idea to do any charity-related thing through official monero sites - such as getmonero. Why? Because Monero is apolitical. No matter which charity there will always be some sort of political underpinning.

What COULD be done is to do browser mining where all proceeds went to the monero foundation address instead - one could set it up when idle, and people could choose a cpu% or such. That would make it possible for people without technical know how or motivation to donate that way.

Unrelated to the official monero sites someone with the ability to carry through could setup donation sites - with the use of monero of course.