I;m not saying freecycle is yahoo, I'm saying they use yahoo's mail servers for their mailing lists therefore they need to be avoided until they move to a decent mail host. My MIL went to freecycle and wanted to sign up for the local mailing list which was a yahoo group. She signed up for a yahoo account and filled in her information and that information was shared with yahoo's marketing partners.
Now I could go on an on with several more incidents that are yahoo related but not freecycle related, like when I bought something from a yahoo store and unchecked the box allowing them to save my credit card information in the yahoo wallet then a few weeks later got several charger for porn sites and a $200 pair of shoes from a company called eastbay, but those are not related to the freecycle mailing list. Yahoo refused to assist even the policeman who too the theft report and refused to delete my yahoo account. But in short we all need to avoid anything that might use any of yahoo's services in any way until they discontinue some of their invasive and unsafe business practices.