I am playing with AS, and see that when a group is created, Admin and Member roles are added to the DNN security roles for that group. So if i create a group named Testgroup - i end up with 2 new roles called testgroup_admin and testgroup_member.
I have read on the DNN forum that there is a limit to the number of roles any one user can be assigned to - and that limit is the cookie size limit of 4k - all roles that a user belongs to are listed in the cookie by role name not role id. The consensus seems to be that that works out to 40-60 roles. I think that for AS that is pretty optimistic, as i can see groups being named San Diego DNN user group_member - that is a pretty long string when you think about it.
While there will not be any problem for small sites with specific groups - even like my example - you wouldn't expect someone to belong to 20 different city specific groups... but for other things like education related stuff - or interest groups, it seems like a problem. Especially long term.
Am I missing something? or is this a problem that I need to be very aware of when it comes to how many groups and what type of groups i want to encourage?
The DNN post that has info on this is:
DNN Forum Topic on Role Limit