So are we going to ignore how Jaekyung is stalking and harassing Dan?

Stalking is a fair bit different tbh, he just went looking for him (it's similar but different).
The harrassment was a given tho. Ain't no way this dimwit had enough time to himself or anyone to talk to to get a eureka moment to realize his wrongdoings and what his feelings are. Which I was really hoping would happen. So I can only bet on Granny as it is now.

this is definitely stalking, dan did not want to be found. jk has made it impossible for him to escape. so it’s both harassment and stalking.

There is a fine line between stalking and just going to find someone. To me this is still just going to find someone, mainly due to what JJ has in mind with it all being different from what the mindset of a stalker is. So far JJ just wants to pressure Dan into helping him and then tossing him aside again, something a stalker definitely wouldn't have in mind if they went to find someone.

Again, similar but still different. Even if they may seem alike, there is still enough info to say this isn't stalking just yet. Intent matters alot on that, especially with story setups like these and what their character dynamic is (for better or worse).