Really, what is the point? It can be destroyed easily by anyone wanting to bend the rules a bit. The only way you can defend it is to do the same (if you can even defend it at all).
Say you have a ql 30 tower.
Normally that would limit the lvl and thus strength of the attackers. But, if they bring along a high lvl friend, he/she can buff them out of the area. Sure the friendly nano restrictions in PvP areas are nice, but whats the point if the attacks can be lvl 30 and have lvl 150+ AC, HoT, Life buffs? They will be totally unstoppable by anyone who can fight them. Should you have to cheat the same way just to play NW?
I dont know if thats an exploit but I have sent an email to FC about it.
NWs is just so screwed up right now. What good is a game that caters only to the exploiters?