First off this is just my opinion and yes it could and can be wrong but I believe that Blood porting (purposely dying just to rez somewhere else on the map) should not be allowed except to the closest owned keep or your home base. Blood porting across the map just gives the larger factions a bigger advantage as they have the manpower to do this and successfully attack the map from both sides!!
Anyways like I said this is just my opinion and to me it is just another cheesy that ZOS either did not properly think about or just does not care about.
Hammy!!