Less adsense..but you guys never click them anyway so it wont make any difference
If your advertising isn't based on page views and you're basing the decision solely on user experience then go ahead, If page views play a big part in your revenue stream then probably a good idea to consider it carefully.
But it's your charityhaha...what revenue stream? AD = Charity!
Maybe time to set up a domain auction part of AD to make a little revenue?haha...what revenue stream? AD = Charity!