DO NOT ALLOW PEOPLE TOP ADD MY EMAIL TO A GROUP AND SPAM ME THROUGH IT

There should be some way that you can stop people from adding your email address to a group without your permission.
I am constantly getting spammed through yahoo groups and there is not clear way of how to stop it!
I did not consent to my email address getting added!
the groups always have names like tt1234kojghsdfafkljhbaw4
and I get bombarded with so much junk that I have to create about 20 filters a day to stop the shit!

Please develop a way to remove emails permanently from ALL yahoo groups!

and let me know