Why doesn’t yahoo ban the IP address of the ever famous shoe spammer?

Kirby: Why doesn’t yahoo ban the IP address of the ever famous shoe spammer?
Yep he is back. I don’t get why they don’t just ban the IP address that would end this once and for all.

Answers and Views:

Answer by Yeech
Because Yahoo needs as many Ids as possible for advertising purposes. The more people it looks like YH has, the more advertisers spend on advertising. It is simple economics.

Answer by Susanne
god i know i hate that guy the one that always trys to sell me nikes ugh! i always report him for spam i gety what your saying thouhgh

Answer by Yahzmin (US) [busy]
They can’t. First of all, those spammers use ‘dynamic’ IP addresses which change constantly. They may even change from one posting to another. They definitely change from one account to another. Also, they try to avoid such blanket banning because of issues where people usie library, school, or internet cafe IPs (which would ban anybody from that location) or cases where families may share an IP address.

That is why they depend on folks like us reporting these spammers. Report 6 of the answers, write SPAM in the text box — and the staff will be alerted and suspend the account. There is also a cadre of users that hang at the Suggestion Forum who dedicate a BIG part of their time to finding and reporting these spammers, trying to help control them. So there actually is a LOT less of this than there was a year ago.