2) could be a tactic. I rarely give 5 stars (because how often does something actually 100% meet expectations?) so I assume that 5 star reviews are either:

a) scammers

b) people reviewing with zero/way too little context ("this is the BEST maternity ward in the universe!!!")

Likewise, I figure most 1 star reviews have some sort of axe to grind.

So I gravitate towards the 3 star reviews - that's where the interesting stories are.