I have been a Custom Scenario player here on Voobly, on and off, for around 3-4 years. Over the course of even the past 3-5 months I have observed a precipitous decrease in the number of active players in the CS lobby.

I mean I think most of us will agree that the CS Lobby has experienced a "steady decline." However, the past 3-5 months have encountered a decline that I think has been magnified as compared to this "steady decline" that has frequently been discussed.

Any opinions on the cause?

yeah, CS players (in general) should be more friendly, they should not insult other players so much...
They should learn other words then noob, gay, dumb ****, **** etc etc...
I know it's not only for CS, but in CS this problem is much bigger then in MS.

Gaming is for fun, Voobly should ban all those guys who do nothing else then insulting, yes, you will loose 20-30% of the players in a short period, but, after a few months, there will be many more players...

You asked opinions, I give you mine...
I guess my opinion will not be very popular, but it's mine and for me it's the truth...