We have seen no detection, but some people have gotten banned because they where reported. So if you play safe, your chances of getting banned are low. EFT also does not use HWID or IP banning, so you should be good on that account.
For CS GO also if you only play two or three games a day you are much less likely to get overwatched banned. Also, do not play on Casual or tdm because reports on there count towards your overwatch chance. Steps are nice to have on for ESP.