I don't think that was true, even the AWP (highest damage in the game) wouldn't kill people if you shot them in the legs or below. I think at least, was a long time ago I last played the game. Scout was even worse, only headshots would one-shot someone.
It was in the beta days. You could camp the long tunnel on dust and every AWP shot to the terrorist feet as they came down the tunnel (before they could even see you) was an instant kill. It was 'fixed' so you had to hit them in the head for a headshot instant kill.
I guess it was "fixed" so that you had to hit them in the body or above, because a body shot with the AWP would kill someone instantly in 1.6, if I remember correctly.
My favorite thing to do in the earlier versions was to "gun-run" dropped weapons back to base, since they did not despawn at the end of the round. So much fun amassing a giant arsenal for your teammates to pick through.
I honestly can't recall when that was fixed. It's just such an embedded counterstrike memory.
My second tech job IT setup an internal counter strike server and a bunch of us would play at lunch or after work until someone yelled at us for screaming at each other over the cube walls.
no, bunny hop is an artifact of quake strafe code, which was retained in valve's goldsrc. it was fixed in Source since it's a completely new engine, but goldsrc counter-strike also had its own mitigations, which I assume were special cased hacks. I played from early beta (russia LAN party "pro" cs player here), and I distinctly remember when bunny hop stopped working. I was running out as ct on de_dust, and went to do a hop and it wasn't working. "they nerfed hopping! the game is RUINED! the casuals won!" etc.