Do radio stations have an obligation to their listeners to make sure their advertisers are not scammers?

Question

Do radio stations have an obligation to their listeners to make sure their advertisers are not scammers?

Answer 1

They certainly SHOULD, it's their reputation.

For the Love of Money, what shameful thing wouldn't be done?

So for the most part they try hiding behind, disclaimers/indemities such as "This is not the view of ZZZZ radio stations or our Affiliates" blah... but could still be viewed as junk handlers or associated with BS'ers.

Same for television, internet, print media - lack of social responsibility!