Honestly, I don't believe save TF2 will get anywhere. Valve is clearly uninterested in supporting the game, and who could fault them? It's an old game, and games don't need to be supported just because people play them.
The real problem Valve is playing with is that TF2 is still monetized. They should not be selling microtransactions for a game this broken. If they weren't selling microtransactions, they would be entirely in their right to kill all official support and leave the game to community servers.
My main concern is that Valve will calculate this over the bad PR they're receiving, and rather than do anything to curb the bot problem, simply kill their support for TF2. I would be okay with this. I think most people wanting to #SaveTF2 won't be.
If you join an official public server, there's an extremely high chance you'll join with cheater bots that spawn endless, aimbotting snipers. It's less of a problem on community servers as they're actively moderated by players, but official servers have to rely on vote kicking a fresh cheater bot every few minutes.
This is all done by some script kiddy group who apparently want to highlight Valve's deprecated support. Basically ruin the game until Valve fixes the game. There's also some measure of farming ingame item drops to sell for money, I think.