There are no rules to HOing.
What we DO have is a general public disdain and disgust for somebody that ONLY puts every effort they have into getting a face shot then runs away, never to make any other move.
The HO, as an angle that you shoot at an enemy, is a perfectly valid thing. If you have a toolbox of moves and you find that one tool suits your purposes, then use it! HO the sucker!
The problem is people that have a big empty toolbox with only one tool. Say you only had a hammer. Soon any fixit job you had would start looking like a nail. You can imagine how bad it would be to try hammering sink faucets to work, or hammering screws into plaster, or hammering doorknobs tight.
IMO it's not the fact that people HO that gathers disdain. It's the fact that's ALL they do, and all they aspire to do. You could fill in the blank "Climbs to 30K, dives to the deck and runs screaming for home any time you get near" or "bails out as soon as the enemy gets within 2K" or any other pathetic move.
It's the attitude we hate, not the move. So, HO away, and enjoy it! Just, don't use it if it doesn't fit. Learn more than that. You'll do just fine.