Yes, agree with the original poster, they can be dangerous,
Witnessed a taxi who thought he had the "street covered" & after a lady refused to pay the extortionate price requested
hailed a passing cab. Within seconds he had a long sword out & was about to attack her. The hotel security guard intervened......
I went to park my pickup on Sukhumvit Soi 11 in a normal parking spot & was told on no uncertain terms "NO, Taxi only.
So moved 50 yards down & parked with this guy running after me No, No.
I just walked past him & got bumped & a "cutthroat sign"
When I returned 20 minutes later I had 2 front cut tyres & the brand new spare had been unwound & stolen.
They are a mafia & dangerous.
Some of you must lead a very sheltered life here