You know who you are.

If you want to set yourself up to practice try the following:

- create a file in your csgo/cfg folder (the location of this depends on your operating system) called practice.cfg
- paste the following console commands into that file and save it:
---BEGIN - DO NOT COPY---
bind l noclip
sv_cheats 1
mp_maxmoney 50000
mp_startmoney 50000
mp_freezetime 1
mp_roundtime_defuse 20
mp_buy_anywhere 1
mp_buytime 1000
bot_kick
sv_infinite_ammo 1
sv_grenade_trajectory 1
mp_warmup_end
---END - DO NOT COPY---

Once in game, start a game offline with bots, select your map, select no bots, and start the game. Once in game, open the dev console using '~' and type:

exec practice

you can then restart the game with:

mp_restartgame 1

Now you have 20 min with infinite ammo/nades to practice nade throws, spray control, whatever you want. You can also use the 'L' key to go into noclip mode and fly around.