People who don't respond to comments or questions

People who get a DD whose art you don't think deserves a DD

People who don't read &/or comment on your Journals

Friends who take extended breaks from DA without giving you a reason

People who upload over 20 different deviations at one time

People who don't use their Scraps & upload anything & everything to their galleries

People who have a lot of different art who don't have folders in their gallery

People who block you for no comprehensible reason

People who can't take reasonable criticism without throwing a hissy fit or blocking you

Other....