I play roblox, with Builder's club and started playing about a month ago.
The message is over the internet - 'STOP THE WAR'.
Roblox is laggy, but not all servers are.
The build system is harder than blockland but you don't have to be a blender/ms3d wiz to build weps or vehicles since you can ingame.
I do prefer Blockland, but roblox isn't exactly awful. Seriously, if anyone wants to moan about it, feel free, but you are extremists who are alienated by the fact that you just happen to have chosen all of the laggy pointless servers to go on.