??? What is the point of the backdoors, do they help you? Are they safe to use? ???
Backdoors are simply ways to get into certain rooms or games when they are full. They are absolutely safe. I've very rarely had to use them, but some people want to play in a specific room, and this allows them to even if they're full.
I use backdoors to get into rooms that are full. This is particularlly helpful in Lottso where the more people playing Team rooms the higher your score will be.
Backdoors are very useful. I used them when I get the message :Server full:. There are many to choose from.