Title says it.
I think this could be useful to have this option.
For an example server setup:
Host message
message mode: MODAL
Server groups admins,normal
b_modal_ignore True
results to:
admins and regular members to be not bugged with a window filled with rules and tips for guests, while showing that to most of the users visiting server for a first time.
Decision about under which group to place this permission I leave to devs.
If you ask me this permission should be only in serverGroups.
Would add a poll but can not find it.