"Hey Alan,
may I ask you to remove me from your junk mail list?
Getting several mail every week with stuff I am not interested is quiet shitty.
So thanks for not sending me those mails any more."
Not going to name and shame, but signing up for a group and receiving emails for said group events and then leaving such a message for the organiser (instead of removing himself from the group) is "quiet shitty."
Am I suprised, that said person has made no friends here? No. But he claims to work as a Sales Representive for a Luxuary Goods company which is a bit astonishing.