So hey,
I downloaded lately the multi bot made by M2bob.net and I used it to level up a character to lv35 within two or three days, than I kept using it to fish bot for about two days.
The server is French, offical server, the newest server they made, it has been alive since like 3 weeks according to player I've asked, I got banned, they didn't say the account was "banned" but "blocked" so I think it's the same thing.
Anyways, I was obviously botting when I was leveling up the account, I've played into very very very popular places and I doubt no one saw me because I was never in, I just left the bot open, then when I started fishing I got banned.
So overall, I think you should becareful from using fish bot.