maybe sify guys are heavy chatters. but that would not include voice chat and video conferencing. and they have to give a higher limit to prevent user yelling back. so the margin is pretty safe i would guess.
the proxy thing could work, of course, we'll see abt that, but as he said i am not at home in the daytime.. and also there is no unlimited connection available.. besides all i dooff the internet is download.. i download stuff for like 10 - 11 hours of the night and when i had the 32 K pack i left it for 20 hrs at a stretch.. so that would leave you with little or no bandwidth