I have seen this article one of my colleague Hassan Hussain. I've decided to use other approach to bind data to GridView on custom ASP.Net page - instead BusinessEntitiesCollection I used Fetch.
There was question on AxForum - why it is not possible to delete team through interface. One of visitors - slivka_83 suggested to use SDK and Delete message. I've decided to make ISV.Customization which will add Delete button to Team grid.