At least we aren't sweing braid-ripping and "foot" burning. But yeah, the owner is going a little beyond just light teasing, like with stuffing the socks in the mouth.
It started with some kind of sour candy, which she called a cloud, then real clouds, lightning and finally electricity. Kanji for electricity is "電気", you can see it half a dozen times on this post alone.
Tossing the socks on her was kind of dickish, but he only stuffed them in her mouth after she (intentionally) beaned him with one. The sour candy didn't bother him at all, and Reimu was literally begging for it, so he gave it to her. The batteries were akin to telling a kid to stick his tongue on the end of a 9V battery - we did that in grade school here. And he tied her in the bag for the night because she was badmouthing him, which she apologised for after he relased her.
TL;DR It's actually pretty cute. Anon is taking the time to answer all his pet's silly questions.