Question about CS:GO

Are the mods detectable?
Like obviously if you go around with aimbot continuously spraying getting kills will get you banned due to reports and obvious modding, but if i, lets say just use wallhack, is that at all detectable if i make it look legit?  Can overwatch/spectators detect/see walls?

Also, when CS:GO gets an update, or steam, should I disable the mods in the meantime in case they update their detection methods?

Lastly, If I bound headshot/chest only shots to a button, is CS:GO / Steam able to detect this? Again, if i made it look legit and only temporialy used it?

playstyle matters for overwatch, if you're using wallhack or legit aimbot you also have to pay attention to not being blatant, if you go obvious, you will get overwatched, also best way to know if everything is ok, is following the forum daily.