Well the "ways to avoid it" has proven almost impossible for us! If you are taking about telling thousands of end users to stop using Compatibility View or even in a corporate environment it is really hard to make them push out gpo:s to avoid this evil thing...
For now, we are forced to make change in the telerik source code and compile manually each release, which is really annoying!
We have to change this in RenderModeBrowserAdaptor.cs:
//(!IsBrowser("IE") || Version >= 8);
And setting the X-UA-Compatible to IE=Edge...
Can't you make this as an option at least (ForceModernBrowser or something)?
So we don't have to recompile each release, or even start using nuget...