Could always summon people to a cano too, or underwater. I don't really like the idea of summon at all. Can summon people to areas of the worldmap they don't know, at night, and they'd be lost for hours. There are areas of the world map that you can only get to by flying, and people could be trapped on an island with no way off other than another summon or portal. Even the world map could be a sucky place for some players, especially new players.

If this is simply a way for summon to be a more discrete spell than portal, than perhaps make an "accept" function. I don't really enjoy the idea of summon as an aggro spell, I think there are always going to be ways to really screw people over, where they sincerely have no defense against it. With transgate, or transport, sure, the person is killed, but they aren't screwed over and unable to play.