Recently, I used a separate WhatsApp account to interact with a group chat that I have with my friends. After about a week, they disabled the account, with no way to re-enable it.
An easier solution is to just not use WhatsApp at all and look for the alternatives for bot purposes. Telegram explicitly encourages bot usage with no risk of bans.
Do you mean “jurisdictions”?
There are still some European non-EU countries where you can get an anonymous phone number because laws are not fully enforced.
Nobody who knows law would use “legislation” in that sense, nor would they recognize it in that context, Humpty Dumpty.