Hi Amit,
First sorry for asking this very long question but I have no other source who can answer this reliably. So here is my very important question.
Actually this was answered back in 2006 on adsense help group but in meantime adsense policies had been changed and also Google adsense API is released.
So let me try to post my questions as clearly as possible:
I run a blog, "devilsworkshop.org" where few guest authors post from time to time. Now I want these guest author to be able to display their own one adsense unit on their article pages. Also please note I use only one adsense content unit on one page so there won't be two adsense content units from two publishers on a single page. In fact I will make sure that all adsense ads on one page get displayed from one adsense account.
So here are my questions:
1. Is this allowed by Adsense? If yes, Do I need to get permission from Adsense team separately?
2. What if a guest blogger start clicking on his own ads or violate any other Adsense TOS? Of course he deserved to get banned, but will it affect other publishers, for example me?
3. What will happen if a guest publisher gets banned because of his activities on other sites he may be monetizing? Will his involvement with my site will create problem for me or other adsense publisher on my site.
4. Will any violation by anyone else affect my site indirectly. Like blacklisting or poor ranking at Adwords end?
I know I am asking too much but I need these answers from long time.
Also please do answer at your convenience.
I am in no hurry...
Thanks for reading,
-Rahul Bansal :-)