All bot's have the same risk, Some slightly more then others, some more vague then others.
I guess you can call it Luck if you archive you're goal without being caught.
You can call it bad luck if you get caught, It seems 45% of frequent botter users get away with their goals, (Bare in-mind not all are 99).
Bot carefully, with frequent breaks, for every hour of botting divide by 3 and the time you're given do LEGIT PLAY on it, Doesn't count as Pking. Do things such as hanging around with friend's talking about good things, or hang out at clan wars or something along those lines.
I hope I helped,
Best of luck, ~iLevel.