How do Discussion threads even work?
Read the second post of https://forums.pokemmo.eu/index.php?/topic/54045-tiering-etiquette-guide/
Then apply your newly obtained knowledge to the issue at hand (Snorlax / Blissey) in this case.
If you notice your posts suddenly dissapearing, it means you have failed one or two of these two steps.
When this becomes an occasional occurance, you must re-evaluate yourself and your contribution to the Competitive scene and ask yourself this "Does what I write in these Discussion threads actually contribute in a meaningful way?"
If the answer is "no", please stop posting.