Marcusm if he had written:
"Hi I just got my bathroom redone by this guy 07900803531 He done a perfect job"
I wouldn't have a problem with it, and that would be more sarf London.
There is a bigger issue here of unsubstantiated and fabricated recommendations. I'm sure it is not just me who has used this site to verify whether or not a tradesman is any good. Unfortunately the internet allows many unscrupulous tradesman to manipulate online fora for their own gain, sites like ratedpeople etc are far too easy to hijack. I have learnt this through bitter experience.