To clarify, if I only have the name change and undub patch installed, streetpass is more or less safe? Sorry if I seem overly cautious, but I really do not want to negatively affect anyone else's game. I am graduating soon and would like to see if I can take advantages of people's streetpasses on campus while I still can. I would really be relieved if I can safely collect resources from other players or eventually collect the battle/visit bonuses (especially Ganglari). I am unlikely to directly use the wireless feature to communicate online or start a wireless battle, anyway, if that is what is specifically impacting people. (I suppose I also might be a little unclear if particular features of streetpass constitute as online, unlike the wireless option, which is straightforward.)
On another note, it was very amusing to play the Before Awakening DLC with my patches. Kamui and Felicia's voices were in Japanese via the undub patch, while Chrom, Frederick, and Lissa's were in English. I actually liked the English dub in Awakening so it really was quite funny.