In some maps there a sniper post who gives you invicibilty if you prone. Only your head and your gun is visible and the sniper is above you. I call that cheating.
Max: you will probably play on Gamblexx servers who gives the best ping for euros and are the most busy. I've been whining a lot about proners (they cheat, why can't I ruin their life ?) and even killed an insta proner, using the lean bug (ok, I shouldn't have done this but I warned him before and he continued to instaprone, bad for him, I was in bad mood this day).
I had the big surprise to see insta proners changing their tactics, like Wirret, Misty of SethGecko. Last time I played with them, they told me: "hey look mad, I don't prone anymore!" and they started to whine against others proners... Misty has even suppressed his prone key from his configuration.
The funny fact is that they acknowledged that they have a better score (no debate about score plz, I'm against it but only to explain here) since they don't prone anymore. Except Wirret maybe who has always high scores.
Don't prone, don't lean and don't use the P90 suppressed to fire through walls.
Camping (but not prone clipping in walls), nading or using shotties are valid tactics. The only things that upsets me in nading is the ff. I generally die from a blind nading of my mate.
We can speak also about running and aiming but well, you will need a real teamplay therefore, etc,.. and everybody is doing this for the moment...
See you soon