So, there is a gil spam block addon, and as far as I can tell, it violates the terms of service because it performs injection - so I won't discuss it further or use it.

SE, why is the spam so bad? and why do you not do enough about it?

Here's what I come up with, which I assume isn't original because this problem has been around for years. I will list it anyway just to demonstrate that yet another person has the same suggestions for fixing it and the same complaints as everyone else.

1) Maybe we should start working with the spammers instead and pay them to not spam us because SE doesn't do enough?
2) Why not change the 'busy' status to 'no gil spam'?
3) Why not implement a friends-only-tell status?
4) Getting friend request spam is way better than /tell spam. At least it isn't in my fricken chat. - so let the spammers win by making it more acceptable to /busy.