IG walker communicates only with your client, sending requests and infos. OOG is communicating with the server and GMs can easily check the data packs and see that something is not good. My friend got banned in middle of giran with a dwarf only for selling stuff. Someone has luck with OOG, someone not...
Btw, if GM bans you, he won't write you pms like "Are you alive?" or anything else. There are popular botting places like WoA, Varka/Ketra or near goddard. At these places, the 90% of players are bots, so not hard work to find out who is afk and who not. If GM makes mistake, he won't tell it, they always find a reason why you get banned.