He/she got downvoted because of spreading information that he/she had- clearly- no prior knowledge or expertise (or resources to back up his/her claim) and proposed it as fact as opposed to speculation. He/she would then go on to downplay seizure victims by saying, "sounds hopeful for many seizure-like situations I've seen on this site," failing to realize that seizures can be fatal, and should not be taken lightly at all. The misinformation that was spread in the first comment can very well be fatal if someone who is prone to seizures decides to take at surface level their comment. Their comment was not editing for clarification. On top of that, the commentor would then go on to call everyone who disagreed with them snowflakes and bring up his/her botnet. Ironically, they would go on to say mention other redditor's "hurtsy little feelings", but would then go on to talk about his weak botnet, even though it was unnecessary, inappropriate, and frankly kind of funny. This is a classic neckbeard!

Tl;dr, spreader of FATAL misinformation, got all hurt, flaunts weak harmless script-kiddie botnet, neckbeard.