If they weren't they wouldn't let them do it. Maybe amateur investors will get upset, but as I said in another comment the pros know that this tactic will not

If they weren't they wouldn't let them do it. Maybe amateur investors will get upset, but as I said in another comment the pros know that this tactic will not only scare off competition, this will scare off potential competition. Few will fund a company to compete against an incumbent who is large and powerful enough to do this to you. There are other battles to be fought, so why risk it?