Some information to know about PvP, as many people seem to be having trouble:
-If someone is dtw (defender too weak) it may be that they don't have enough strength and intellect energy to be hit. This could be because someone hit them before you and "took" their energy or they forgot they posted in campus and then used their energy on hitting someone or partying. It could also be that they are just too weak and out of your range to hit, especially if they don't have showcase or dorm stats and you do. If someone is DTW, it's best not to tell them and just move on; they might already know and get annoyed by all the walls and therefore stop participating to be left alone (this is just an observation from past PvP hunts).
-Stealing bats is not guaranteed on every hit; it is luck based. However, it seems that hitting someone much smaller than you will give you a better chance of stealing, and much larger players hitting you will allow them a better chance to steal. Basically, you hit really small people, and let really big people hit you.
-Luckily, though, bats can be earned from parties like usual; POTD, PPOTD, PPA, CC, and DS drop them, as well as the invite parties. Therefore, the only real reason for PvP is to lose bats, but this is (as we know of) totally optional and will not affect on you getting the second side story when it's released.
TLDR: DTW doesn't always mean they don't have energy; stealing bats is luck-based but there are ways of upping your luck; bats can be gotten from parties so you don't really have to PvP unless you want.
Just don't want people spreading false information and getting everyone confused.