There is definitive distinction between a "support animal" which has not technically been  certified as "service animal".

The phrase "this is a business" and "training your tenant" come up alot in discussions like this.There is a distinction between what that means said to a tenant and what that means when said to a business partner or peer.You want your tenant to understand that phrase to mean they should pay what is due, when it is due or suffer the consequences stipulated in the contract.

@Roy N. that's a very helpful distinction.

I ask 5 distinct questions that must be answered in their response e-mail.  

There's a distinct possibility their parents have no idea you couldn't/wouldn't sue them out of state, and besides, most (not all) parents will do the right thing when it comes to their kids out of a sense of duty and shame, if nothing else.

You are right no one trusts a landlord, Landlords are not a trustworthy segment of business society, akin to the loan shark business. 

There are 2 distinct boxes Also, see the screenshot below.

In SF there is no distinction if it's apartments or condos, just unit count limit that is zoned. 

To some degree I agree with both @Tom V. and @Greg S.Then again, I'd like to add that I think a distinction should be made between the (surely rare) case of a person having no credit score at all and one having a bad credit score.

While not necessarily exclusive to ST rentals, and certainly not for everyone, the distinctions between traditional LT landlords and ST hosting/rentals are distinct, tangible, and worth comparing against long term goals.