They recently passed a law called "Ban the Box " where employers are not allowed to ask job applicants about their criminal background .

As an example, in the city of Long Beach, STR is tolerated in the R2 or plus zones but totally banned in R1/SFR zones.

Then I go to send a message to a handful of  local peeps I want to meet and interact with and after 2-3 messages I just got "banned" and can't send anymore messages??

If you ban both you risk someone falling on your property, and whether you are liable or not, it's not worth it.

After several phone conversations, the parent finally confessed about lying to the police and was hoping that I can ban the daughter from visiting.Can I evict my tenants because of the daughter?

If you violate enough MLS rules, lawsuits or nay, they ban you, don't they?

I am not in Anaheim just outside so once the ban takes place in Anaheim, there definitely won't be many homes with swimming pools around Disney.I've also got short-term rentals in Arizona and they all have swimming pools and they all get used. in Arizona it's needed because everybody has a swimming pool.

For safety reasons, you might want to consider banning space heaters altogether.   

(In the scenario, sure, it's possible the new council outright bans STRs or limits them to only your primary residence as they did here in Denver.) 

But 3 weeks ago, some tenant installed a hidden camera in one of our unit's bedroom.Airbnb banned all 14 of our units and overnight all of our winter vacancies were cancelled.