Stop seeing cloud Avatars

click on the Advanced Menu at the top of the screen. If it is not next to the Help menu, press ctrl+alt+D to make it show

Select Debug settings.....a small window will open. select "RenderUnloadedAvatar" from the drop down box and then set it to "True" then click the X in the corner to close the window

This will stop you from seeing others as clouds but not stop you from being one to them. They must change their settings for that