1. bunnyhopp!ng. youll never hop fast enough to survive my 1337 fastfingers xD
.on my opinion bunnyhopping scripts dont give you such a HUGE advantage in NS cos bunnyhopp!ng is sooo easy, even for non-scripters

2. Gaussjumping: o.O
3. Weapon Switching: hud_fastswitch does a gj too, and even with a script you change your weapon 1/100 sec faster...
4.handgunning: well... right, thats the most annoying script for all you lil skulkies out there. but not every good player uses them. there are still some ppl (like me) who can click as fast as you without a script. but the problem with this script is: your shots arent very accurate if you bind it to mwheel.. you move your mouse a bit and the skulkie laughs @ you
5. issueing commands: (most annoying: need orders-spam). on my opinion just a lil help for all the lazy ppl who dont wanna use the commandmenu ^^
6.saying things: sometimes annoying, but otherwise just like the commands just a lil help for all the ppl without mic.
7.misc = aimbot/wallhack/armorhack/ogc ( ^^ ): o.O dont use this or Don Alfredo puts a large hole in you and the admin uses you as a punchingball

[EDIT] if you find any mistakes in my sentences, dont tell me, cos im not THAT good in english ^-^
[EDIT2]: @Diablo_fx:
bind "mwheelup" "+attack"
bind "mwheeldown" "+attack"
... just move your mwheel up and/or down, and you got your 10-shot-hmg