QuindaliWhile they are legitimate opportunities to be exploited in a match, it's not the standard 6s meta in NA and many people find it to be disrespectful.
I'd like to point out that this kind of thinking is detrimental to those who want to improve. If something works, no matter how gay, it is a valid tactic that requires you to learn how to counter it. If someone is running 24/7 heavy and it's working it means your team is bad. PUGs are a different story because it isn't reasonable to expect 6 random people to have proper team cohesion all the time.