studying bus routes is nothing wrong. That frenz of yours is a
person that save $$ on transport. Imagine he can just spend $52 on
bus concession stamp which is his total transportation costs.
Next, i feel that ppl's life are just like bus routes. svc 145 and
147 bus routes are different. Similarly, everyone life is
different. However, for svc 145 and svc 147, they meet at chinatown
and clarke quay area. Similarly, in life, we will meet and part
with ppl. The fact that sgforums provide a place or platform for
ppl with common interests to gather together and discuss. When i
first came into bus forum, din know ppl here are so hardcore abt
buses. 
I will stay on with this "wierd" hobby of mine cos it makes me
unique. And your frenz too.
PS: Dun overgeneralise your statements cos it can cuse resentment.
Thanks.