It's not "harmless", at least as far as board health is concerned - those kinds of posts do nothing except kill the mood for everyone else, and invite the "feels bad man" and ">tfw" crowd to crap the place up like a plague with their eternal bitchinz and pity olympics

If u want to post that stuff but don't liek the current state of 4chan's /r9k/, try these places instead (just don't complain that they suck, are filled with Rule 8 or angry /pol/ posts, or the users deemed you to be a "normalfag/normie" - that's par for the course!):
https://wizchan.org/
https://zzzchan.xyz/r9k/
https://zzzchan.xyz/hikki/
https://uboachan.net/hikki/
http://tohno-chan.com/ (currently down apparently)