I thought of that awhile back, and I think that if there was an option of "invite players to a tournament" it would end up getting abused.

I can just see some of the tournament creators going down the list of ranked users and inviting EVERY person for each tournament - I'll probable end up with spam for each tournament (which there is a lot if you include Fellowship tournament).

Of course for the private tournaments Fencer is working on, it would need to be able to invite people - but for normal tournament, i'm not sure if I would like that option. :-)