As an experiment i've made two "main" accounts a botted main, and a handplayed main..
my hand played one is 1500'ish total, my botted one is 1700'ish total.
If you bot f2p WC, you're asking for a ban
-! My opinion !-
99% of the bans are player report related, bot smart in low pop. areas and you'll be fine.
It's all about RNG, some might get banned after 3 hours and some can bot for 3 years without getting hit a single time..
Runemate is most likely THE safest and potentially the best bot for runescape there is atm.