Okay, Glasnost I share your point of view about McD's but I don't think getting cross is helpful.
I'm sorry my previous posts have not been more explanatory but I was using my phone.
I personally do not think Mumsnet should accept advertising revenue from McDonalds. For me, the reason for this is wholly unrelated to the healthiness or quality of the food. If it was Pizza Hut we were talking about I wouldn't even post.
I absolutely agree that this is a business and that they need to generate revenue, and advertising I would imagine is just about the only way to do it and should be fully exploited.
However, this is a community of people that will not accept advertising revenue from Nestle, and not on the basis of the acceptability of its products but on the acceptability of its practices.
On this basis, there should be equal reaction to McDonald's practices. For a full explanation of this, it really is worth seeing "Fast Food Nation". Of course a lot of the criticism against McDonald's is over-emotional, over-hyped and can be dramatic.
But at the very least, in the 90's they sued five Greenpeace volunteers in their personal capacity for criticising the organisation. Three of them publiced apologised, but two took McDonald's to court. They earned $12 000 a year between them. The judge found they couldn't prove some points, but could prove others.
[http://www.globalexchange.org/campaigns/econ101/mclibel.html one long explanation]
McDonald's are also accused of exploiting immigrant workers in Mexico, razing enormous sections of the Amazon jungle for grazing in an absolutely avaricious and uncontrolled way, keeping wages low (particularly in the UK), and controlling a lot of media content because of the strength they have due to their advertising revenue.
(To see evidence of this in action, just google them and see how many pages of positive content you have to get through before you see any debate.)