It's a complex question, before you think about your own ethics.
Robin Hood took the money from the rich to help the poors, that's fine and a good idea, but never Robin Hood as a nice Logo on her flags to promote one of the rich "donator".
We need to move away from this "everything needs a sponsor", we should think how we can as a community create sustainable events. Maybe our current events are juste too big to be fully supported by the community. Maybe parts of the refexion need to be done here.
We are slave of the "free" everything. It's a trap, everything as a price, if you pay with money, your time or whitewash someone... at the end you pay the price.@aral @loic @indie @yukiame