[Unduly personalized - deleted by Moderator]. Can't be arsed getting into useless, long-winded discussion about this, but suffice to say some may be fine with your method, but accept that there are also going to many others that just think it's weird, socially awkward and potentially very embarrassing.

Edit - I see that you're based in Australia. Could account for something - different places, different customs etc. I can assure you that while what you describe undoubtedly happens here and there, it is not the norm in the US, for example.