It's always a good cautionary tale, and it usually (not always) involved seeing a non-reviewed provider.

I spend the first 30 years of my 40 years as a hobbyist calling ads in the paper or going to MPs, and never got busted.  

The same thing that keeps us from winning the lottery is the same thing that will keep us free from LE:  The law of averages.

First off, well reviewed providers greatly reduces the risks involved.  Second...  if it seems too good to be true, it probably is.  Offers of service well below the going rate is either a scam, upsell or LE.  "Specials" most likely are for lesser services or lesser time

Most client busts are Backpage stings involving young women with no reviews and a new ad, offering cheap incalls to cheap hotels. There are other busts, but if you partake in the previously-described trade your chances of falling for a sting eventually are very high, and if you avoid such situations your chances of getting busted are low.  
 

I walked into a massage parlor, through the front door.  It was full of cops who must have all come in the back.  I froze inside the door until one officer said "What do you want here?". I managed to say a massage and he told me go somewhere else.  I was shocked, relieved and might add, lucky.  This was in Norwich, Ct in the 1980's.