YOU CAN STILL USE SKETCHUP TO MODEL, you just can't take someone elses model from the warehouse.
We've made a general decision among invited/staff that taking models from the Sketchup Warehouse will no longer be allowed on the forum/repo in any sense. Modeling in Sketchup is no problem, please continue if you feel comfortable making meshes yourself in that program.
By all means, you can continue to use models for personal use from the warehouse, but no downloads, pictures, or mods will be allowed on the forum with models taken from the warehouse, period.
We hope you can respect this decision. We want to promote people doing their own work, not taking others and getting recognition.
Only one infraction will be handed out for taking a model (posting pictures of "your mod" etc), after that, you get the idea.
If you have a sketchup warehouse account that you upload your content to, please send WhiteTiger a private message and let him know your account name so he can approve your rights to share with the community.
There is a legal aspect as well (Fidoj quote)
the actions where taking are to protect Tdev from a legal nightmare as Google owns rights to everything "you/others" put on the warehouse, the only way we can be sure no legal issues arise is to ask you to use blender or prove 110% that you made the mesh.
these action are here to ensure rigs of rods last's a very long time and grows better.
Any legal action from google because a mesh was used that has copyrights would be the end, of this forum and the game.