It is actually objectively harrasment according to the games ToS I do not get why you cannot understand this.
""・Expressions that attempt to unilaterally exclude someone from the game or content/community, etc.
(Except when in accordance with rules set by an administrator such as a Free Company Master)
Key Points
It is prohibited to make statements such as the following examples to try to kick someone from the party, content, community, etc. as if they are not qualified to participate. If a report has been filed and the prohibited activity is confirmed, a penalty will be issued.
"If you can't do the mechanic well, maybe you shouldn't bother joining the party."
"If you're going to talk like that, why don't you just quit?"
"If you don't understand that, you'd be wise to leave the party."
"Let's ignore them."
"Let’s leave [person] out."
"It's not worth wasting our time, you should quit."
"Don't join if your equipment is that bad/such a low item level."
Like what do you not understand? You are clearly excluding someone from doing content by doing this. Why do you ignore that point so much lol. As I told someone else, you don't have to like it. The randoms you accuse of sniping certainly don't like it, I don't like it. But that is how the game handles entrance to FT. This is not some PF people sign up for. It is literally "walk up and put in a cipher". Nothing more, nothing less. It is not gated behind savages and ultimates where you have to go out of your way to talk to an NPC to unlock said content, it is unlocked by doing OC by DEFAULT. What do you elitists not understand...
As for ignoring them and leaving them on the floor. See ToS again.
"For example, the following types of situations fall under the act of giving an advantage to the enemy (or the opposing team/players in PvP content):
"I don't want to heal because there is a player I don't like in the group."
(Reviving someone falls under healing for me, its fine if you dont see it that way)