No it is not a cheat client. All it is that server has a different mod set up and different maps nothing wrong with that. If you are looking for surf maps start with surf_ if you looking for zombie mod maps start with zm_ now if you do have cheats i must warn you that if their server is VAC secured and has like a shield near server name it is secured and if you cheat there you will be banned if you dont use any hacks good for you high five. If you do then you need to look for a server that doesnt have a shield near the name so its not secure you can use cheats there but how ever other players can report you cheating.
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Yes it is one of the items that the PlayStation Network has that will allow you to be banned and called Offensive Image or Audio see related question for expanded reasons for being banned
Game sharing can get you banned from PSN and the person can hijack your account when you provide your id and password
Depending on the hack. Aim Bot, Wall hacks, Speed hack, script etc. they have websites with hacks you can look up, but many of them have viruses and on top of that if you try to hack in Counter Strike they have very good security program called VAC it gets patched every month and all hacks get outdated and people get caught. You will get banned from the multiplayer and will not be allowed to play the game online. You will have to make new steam account and re purchase the game. You can risk it and get the hack and you can try to find a non VAC secured server where you can cheat there and because it's not secured you will not get caught but it doesn't stop other players from reporting you to steam.
its probably modded or hacked or banned.
Yes. Any modding of the game, no matter what game type you are playing, can get you banned on an online account. This does not include getting out of maps/glitches in system.