Concerning the travel rules, besides the fact that even higher ups need permission, most travel dont exactly look like travels... A shinobi might want to travel and post this in the travel board..."Dray was tired of the atmosphere in kumogakure and decided to travel to konoha".... Then the said ninja would wait for 12 hours so that the travel would be valid... But on my opinion since I rp on two other sites and I have also created a site of my own myself, I suggest that there be a minimum amount of travel wordcount so as to give more reasoning to travel....
Also, concerning intervention or invading threads, I'll suggest that not all invasions should be successful due to unforseen circumstances and for this reason, a dice roll should be used when invading.. Ε̲̣.g... Ninja A wants to invade ninja B. Ninja A has to role a die.. If Ninja A rolls a 5 or higher, than the invasion is successful, etc.. So, since all ninjas are classified by rank, the die values should vary like a jounin can role a 3 or higher to be successful, a chunin, a 5 and higher, a genin, a 9 and higher, etc..but anbus shouldn't need to role to invade a thread within their own country... I hope you get the idea...
Also, concerning intervention or invading threads, I'll suggest that not all invasions should be successful due to unforseen circumstances and for this reason, a dice roll should be used when invading.. Ε̲̣.g... Ninja A wants to invade ninja B. Ninja A has to role a die.. If Ninja A rolls a 5 or higher, than the invasion is successful, etc.. So, since all ninjas are classified by rank, the die values should vary like a jounin can role a 3 or higher to be successful, a chunin, a 5 and higher, a genin, a 9 and higher, etc..but anbus shouldn't need to role to invade a thread within their own country... I hope you get the idea...