If because I don’t like getting ratted again and again is considered selfish, then, I am selfish. Is it fun to Rat others in the Arenas? For me it is bad and unethical to hit someone when they are unaware. So, I believe those that use the Rat to Rat others are selfish as well.
In the lower Arenas (here I mean a tad lower than my max capability), all those Rats are lunch and dinner for my Dinos. Bring in the Rat, no chance it will be able to Regen and appears again to Rat another Dino.
By the way, if you don’t agree with what others are doing, please and please do not call names i.e. selfish or whatnot. It is not cool.