BHV has one of their security guards that sits right next to the T-water at night and keeps an eye out. I have watched him keep a watchful eye or even escort visibly drunk tourists (not BHV guests) that happen to be walking past the T-water to make sure that they make it safely. I have never felt less than 100% safe there. That being said, I happen to lock up properly whenever I go out (especially at home).