Is the behavior necessary-or extreme and immature?

Do you guys honestly cut a woman off after you realize she just wants to be friends (and you want more)...Dont you think this is kind of extreme? When you say block etc do you mean you cut her off and no contact forever? (or just until youre over her/move on to liking someone else?...Not staying friends..idk I feel it's immature/maybe even selfish esp if you're an adult 25+