I thought this would be a fun topic. I just wanted to give people something to think about. You can be sued whether the case has merit or not.
I was sued by my former employer, for starting my own business. He left the building I am in, and left a hole. I filled it. I didn't have a non-compete clause, or anything of the sort. He sued over stealing his customers.
The lawsuit started at $150k, and the suit changed over time. They were looking for any angle they could take. The court system sucks. Across the year this took place, we never saw a judge. We filed for summery judgements, to avoid jury by trial. Judges would rather have it go to trial, so a decision is not on their record. Long story short, We settled for $3k. If it went to trial, it could have cost $10k more.
What did it cost me? $21k.
While my example isn't photography related, it is an example of things happening that you never thought would.
So while we don't like to think of bad things happening, and the probability is that they probably won't. You need to ask yourself what happens when somebody falls down the stairs going to your basement Photography Studio for that $50 portrait session. If you suggest the location for your $20 outdoor shoot, and something happens...