Weighing the pros and cons of collaoration is an ongoing discussion worthy of the deliberation. However, time would be best spent on trial collaborative efforts and implementation than a focus on the negative without experimentation.
The following blog highlights several benefits to collaboration: http://www.dontwasteyourtime.co.uk/eresources/benefits-of-collaborative-learning-elearning/
This next blog comments on how collaboration has changed attitudes-- "everything as a work in progress."
http://www.criticalmethods.org/collab/news.htm
See also Collaborative Learning Trends and The Social Enterprise Blog on collaborative learning case studies.
more to come...
