Is it safe to use WTFast/Pingzapper/Battleping?

[Red_Panda]

I have been toying around with these programs after hearing about their ability to help lower ping and reduce your lag. But while researching them I found a discussion that said that the programs use one proxy IP address for all users and that if someone who was using one of these programs got banned for whatever reason than that would mean you would get banned as well since you are using the same ip address as everyone else. This was the first I had heard of this and it doesn't seem to make much since that these programs would work like this and have such a massive risk involved. Is there anyone that has exp with these programs and could maybe shed some light on this subject?

Also I have been trying to figure out why the instructions on how to achieve the best results according to the website contridict what actually works.
According to the WTFast website it tells you to connect to the server closest to the game server being in Montreal for NA players.
However when I do this I get a higher then normal ping, but if I connect to the server closest to my actual location I get a lower ping.
I found one discussion on this and there was no clear answer with just wild guessing being tossed around. If anyone could shed some light on the reasoning being this or how it works in more detail that would be greatly appreciated.